Slang for Law Enforcement, 60+ Terms, Their Origins, and What They Actually Mean

What are common slang terms for law enforcement?

Common slang for law enforcement includes cops, five-o, the fuzz, po-po, the heat, pigs, boys in blue, G-men, narcs, and smokey. Some terms come from the public — used to describe or warn about police. Others come from inside law enforcement itself, used by officers on the job every day.

Language around law enforcement has always been layered. Civilians develop their own nicknames — some affectionate, some defiant, some just practical. Officers develop their own internal shorthand for the job — acronyms, codes, and jargon that help them communicate fast in high-pressure situations. Writers, screenwriters, and true crime fans need both.

This guide breaks it all down: where the terms came from, what they actually mean, and which ones are still in active use today versus which ones faded out decades ago. Whether you heard a term on a police scanner, read it in a crime novel, or just got curious — you’ll find it here.

Street Slang for Police — Terms the Public Uses

These are the nicknames civilians use to refer to law enforcement — sometimes neutral, sometimes loaded with history.

Cop / Copper

The most universal term in American English — used so widely that law enforcement officers use it themselves. “Cop” developed from the verb usage of “cop” meaning “to take or seize,” used in the early 19th century. The “copper badge” theory — that officers were named for their copper badges — is a popular but almost certainly wrong explanation. In British English, the term cop is recorded in the sense of “to capture” from 1704, derived from the Latin capere via the Old French caper.

Five-O / 5-0

A term for police derived from the title of the television series Hawaii Five-O, about a special police unit by that name. The show premiered in 1968 and the slang migrated from Hawaii into mainland American street language over the following decades. The movie Smokey and the Bandit popularized the use of citizens band (CB) radios to warn other motorists of a police speed trap — and five-o filled the same function in urban slang: a fast, discreet warning that police were nearby.

Po-Po

The term popo, sometimes written as po-po, is slang for law enforcement personnel believed to have originated in the United States in the mid-1990s. Some say it’s an abbreviation of the word “police” (po) or an acronym for “police officers” (PO) expressed by saying it twice. This particular slang is considered more negative than descriptive.

The Fuzz

Originally a British English term referring to felt-covered helmets worn by London police officers, later borrowed into American English. By the 1960s it was firmly established in U.S. street slang, particularly in counterculture and drug subcultures where a discreet warning word was useful.

The Heat

Refers to the police or detectives. Possibly relates to “packing heat” (carrying a gun) or the pressure the police bring. “The heat is on” — meaning law enforcement pressure is intensifying — is a natural extension of this usage that has worked its way into mainstream American English.

Smokey / Smokey the Bear / Bear

This nickname for law enforcement officers developed long before any movie was made. It is a reference to the hats worn by state troopers and some other officers, which somewhat resemble the hat worn by Smokey the Bear, the popular fire prevention mascot. The 1977 film Smokey and the Bandit amplified the term’s use, particularly among truckers using CB radios to warn each other of speed traps on the highway. “Bear in the air” meant a police helicopter. “Smokey with ears” meant a patrol car with CB radio capability.

Pigs

A derogatory term with a long history. A derogatory term dating back to the 1800s that fell into disuse but was revived during the civil rights era. It surged in use during the 1960s and 1970s protests and became strongly associated with anti-police sentiment during that period. Still used today, though its meaning and reception vary sharply depending on context.

The Man

Using “the man” as slang originated in the free-spirited times of the 1960s and 1970s when the police and other authority figures were seen as a power group that wanted to suppress the activities of the times. This term is often used in a much broader sense than law enforcement alone, referring rather to those who have a position of power.

Boys in Blue / Boys in Blue

This folksy phrase refers to the frequent use of blue as the color of a police officer’s uniform — and harks back to a time when only men could become police officers. Today it is used both affectionately and ironically. “Thin blue line” is a related expression referring to law enforcement as the barrier between order and chaos.

Flatfoot

Possibly related to the large amount of walking that a police officer would do; at a time when the condition of flat feet became common knowledge, it was assumed that excessive walking was a major cause. Another possible origin is the army’s rejection of men with flat feet, who would often take jobs in law enforcement as a backup. By 1912, “flat-footed” was an insult among baseball players, and the term migrated to describing patrol officers who walked a beat.

Gumshoe

A term alluding to soft-soled shoes worn by detectives that are more comfortable than hard-soled shoes and/or enable them to follow suspects surreptitiously. In the 19th century, gum rubber soles made a detective’s footsteps nearly silent — useful when tailing a suspect. Today it’s an affectionate, slightly old-fashioned term for a private investigator or detective.

The Feds / Alphabet Boys

A truncation of “federal,” referring to federal law enforcement personnel. Covers the FBI, DEA, ATF, U.S. Marshals, and other federal agencies. “Alphabet boys” is a newer variation that mocks the acronym-heavy naming conventions of federal agencies — FBI, DEA, ATF, ICE, CBP — as a collective.

G-Man

A term derived from “government man” from the mid-twentieth century, referring to FBI agents. The term became strongly associated with the J. Edgar Hoover era of the FBI in the 1930s and 1940s. Still used today but carries a vintage quality — more likely to appear in historical fiction than current street speech.

Narcs

Refers specifically to narcotics officers or any officers involved in drug law enforcement. Short for “narcotics.” By extension, “narc” also became a verb — “don’t narc on me” means don’t inform on someone to law enforcement, and can be used even in non-drug contexts.

Cherry Tops / Rollers

Refers to police due to the red lights atop their vehicles. “Cherry tops” specifically references older-era police light bars with red rotating lights. “Rollers” is another vehicle-based term — rolling law enforcement. Both are still used in rap lyrics and street vernacular.

Related article: California’s Death Penalty, Legal but Frozen Here’s the Current Status

British and International Slang for Police

Law enforcement slang developed independently across countries — and some British terms have crossed into American usage.

Bobby — There are two theories for why Britain’s police acquired the nickname “bobby.” Sir Robert Peel, the founder of the London police in 1829, was the source of the nickname. The other theory connects it to “Robert” as a common name applied to the uniformed officers Peel created.

The Bill / Old Bill — British slang for the police in London, popularized further by a British police drama of the same name. Origin disputed — some trace it to King William IV, others to an old term for a warrant or summons.

The Filth — UK slang, particularly common in London and also used in Ireland, Australia, and New Zealand. Meaning is straightforwardly derogatory. Inspired Irvine Welsh’s novel Filth.

Mounties — The most commonly known nickname for members of the Royal Canadian Mounted Police. Short for “mounted,” referring to the fact that these officers patrolled on horseback historically.

Gendarmes — From Old French “gens d’armes,” meaning “men-at-arms.” Refers to armed police officers in France and certain other countries. Used in American English as jocular, slightly affected slang for police.

Internal Law Enforcement Jargon — Terms Officers Use

This is a different world from street slang. Officers develop their own shorthand — partly for efficiency, partly to build professional identity, partly because some things are easier to say in code.

Radio and Communications Codes

10-4 — One of the most recognizable of the 10-codes, 10-4 denotes an affirmative response: “yes,” “alright,” “I understand,” or “I copy.” These codes originated in the 1920s and were used primarily by law enforcement and CB radio users. Because microphones needed to warm up and the first syllable of transmissions were often cut off, a “ten” was placed in front of the numeric code.

10-20 — An officer’s location. “What’s your 10-20?” means “where are you?” Migrated into civilian slang so completely that most Americans use it without knowing its origin.

APB — Stands for All-Points Bulletin, a broadcast issued by any law enforcement agency to other agencies containing important information about a dangerous suspect or missing person.

BOLO — Be On the Look Out — this term often leads information bulletins to law enforcement officers to try and locate a person or item of property. Used interchangeably with APB in many departments.

Unsub — An abbreviation of “unknown subject,” used to refer to the unknown perpetrator of a crime. Popularized by the TV series Criminal Minds to the point where many civilians now recognize it.

Officer-to-Officer Slang

Beat / Walking the Beat — A reference to a police officer’s patrol area. A common belief is that it’s derived from “the beaten path,” the familiar path of the foot patrolman around his assigned area.

Terry Stop — Investigative detention of a person by a law enforcement officer, named for the 1968 U.S. Supreme Court decision in Terry v. Ohio. In plain English, a brief stop and possible frisk based on reasonable suspicion — less than the probable cause needed for an arrest. What Is Probable Cause? Your Rights During Police Stops — allaboutlawyer.com

Knock ‘n’ Talk — A term used to describe a “casual” visit to a suspect’s home wherein the officer doesn’t have a warrant and is hoping to gather information or consent to search the home. The tactic is typically used when criminal activity is suspected but there’s not enough evidence to obtain a warrant.

Wolf Pack — A group of squad cars driving together looking for a suspect.

Sam Browne — Law enforcement officer’s equipment belt that holds a sidearm holster, handcuffs, radio, and other tools. Named for Sir General Sam Browne, a British officer who lost his left arm and developed a belt with a diagonal cross-strap that allowed him to carry and draw his sword with only one hand.

Barney — This gently derogatory term refers to Barney Fife, a bumbling small-town deputy sheriff in the classic 1960s sitcom The Andy Griffith Show. Officers use it to describe an incompetent or overly eager colleague.

Brady Cop — Police officers who have been found to have been dishonest are sometimes referred to as “Brady cops.” The term comes from the U.S. Supreme Court’s Brady v. Maryland decision, which requires prosecutors to disclose police officers with credibility problems to defense attorneys.

Three Hots and a Cot — A term for a jail or prison stay, and the meals and accommodations provided. Used by officers to describe what a suspect is about to receive upon arrest.

Insurance Pains — A reference to the victim of a minor traffic accident with no real injuries who complains about neck or back pain hoping to get a big insurance settlement.

VICAP — Violent Criminal Apprehension Program, an FBI-run database that collects reports of violent crime across the country and attempts to identify common themes that could point to a serial killer.

ALPR — Automated License Plate Recognition system — a fixed or vehicle-mounted set of cameras and computers that records license plates of vehicles passing by and compares them to a hot list of stolen vehicles and vehicles associated with fugitives.

Quick Reference Table

Term	Meaning	Origin/Era
Cop	Police officer	Latin capere, early 1800s
Five-O / 5-0	Police	Hawaii Five-O TV show, 1968
Po-Po	Police	Street slang, mid-1990s U.S.
The Fuzz	Police	British, felt helmet references
The Heat	Police/pressure	Firearms slang, early 1900s
Smokey / Bear	State troopers	Smokey the Bear hat resemblance
Pigs	Police (derogatory)	1800s, revived 1960s–70s
The Man	Police/authority	Counterculture, 1960s–70s
Flatfoot	Patrol officer	Beat cop walking, early 1900s
Gumshoe	Detective	Rubber-soled shoes, 1800s
The Feds	Federal agents	“Federal,” any era
G-Man	FBI agent	“Government man,” 1930s–40s
Narcs	Drug enforcement	“Narcotics,” 1960s
Cherry Tops	Police cars	Red rotating lights
Bobby	British police	Sir Robert Peel, 1829
10-4	Acknowledged/copy	Radio codes, 1920s
BOLO	Be on the lookout	Law enforcement communications
APB	All-Points Bulletin	Law enforcement broadcasting
Terry Stop	Brief investigative stop	Terry v. Ohio, 1968
Brady Cop	Dishonest officer	Brady v. Maryland
Unsub	Unknown subject/suspect	FBI/law enforcement

Frequently Asked Questions

Q: Where did the word “cop” originally come from? 

“Cop” comes from the verb “to cop,” meaning to seize or capture, which dates to at least 1704 in British English and derives from the Latin capere via Old French caper. The popular theory that it stands for “constable on patrol” or refers to copper badges is almost certainly incorrect — very few English words derive from acronyms, and there is little evidence copper was widely used in early police uniforms.

Q: Why do people call police “five-o” or “5-0”?

 Five-O comes from the television series Hawaii Five-O, which premiered in 1968. The show’s title referenced Hawaii’s status as the 50th U.S. state. The term spread from Hawaiian and urban slang into mainstream American street vocabulary over the following two decades and became particularly common in hip-hop lyrics and culture by the 1990s.

Q: What is the difference between street slang for police and internal cop slang? 

 Street slang — terms like po-po, the heat, and five-o — is language the public uses to refer to or warn about police, often developed within specific communities or subcultures. Internal cop slang — terms like BOLO, Terry stop, beat wife, and Sam Browne — is the professional shorthand officers use with each other on the job. Both layers exist simultaneously and rarely overlap in meaning or usage.

Q: What does “Brady cop” mean in law enforcement? 

 A Brady cop is a law enforcement officer with a documented history of dishonesty, credibility problems, or misconduct. The term comes from the Supreme Court’s Brady v. Maryland decision, which requires prosecutors to disclose any known credibility issues about police witnesses to defense attorneys. Being placed on a Brady list — sometimes called a Giglio list — can effectively end an officer’s ability to testify credibly in court.

Q: Are 10-codes still used by police today?

 It depends on the department. Many large urban police departments have moved away from 10-codes toward plain English radio communication — particularly after September 11, 2001, when inconsistent codes between agencies caused coordination problems. However, many smaller departments and state police agencies still use 10-codes, and terms like 10-4 and 10-20 have migrated so completely into civilian English that most Americans use them without knowing their origin.

Legal Terms Used in This Article

Terry Stop: A brief investigative detention of a person by law enforcement, authorized by the Supreme Court’s 1968 ruling in Terry v. Ohio. An officer may conduct a Terry stop based on reasonable suspicion — a lower standard than the probable cause required for arrest. During a stop, an officer may also conduct a limited pat-down for weapons if they reasonably believe the person is armed.

Brady Disclosure: The legal requirement, established in Brady v. Maryland (1963), that prosecutors must share any evidence favorable to the defendant, including information about police officers’ credibility or history of misconduct. An officer on a Brady list may be required to be disclosed to defense attorneys in any case where they are a witness.

Probable Cause: The legal standard required for an arrest, search, or seizure. Higher than reasonable suspicion. Means a reasonable person would believe a crime has been, is being, or is about to be committed.

APB (All-Points Bulletin): A formal law enforcement broadcast disseminating information about a dangerous suspect, missing person, or wanted vehicle to officers across multiple jurisdictions. Not a legal term of art but a procedural standard in law enforcement communications.

Conclusion

Slang for law enforcement tells you a lot about the relationship between communities and the police at any given moment in history. Terms like “bobby” and “flatfoot” carry a nostalgic formality. Terms like “pigs” and “the heat” carry the weight of specific political eras. And terms like five-o and po-po grew organically out of street culture in ways that even their users often can’t fully trace.

Understanding the language — on both sides of it — is part of understanding how law enforcement actually works in practice, separate from how it works on paper.

VisitAllAboutLawyer.com to learn more about your legal rights during police encounters, what officers can and cannot legally ask you, and when a stop becomes an arrest. Know Your Rights: What Police Can and Cannot Do During a Stop — allaboutlawyer.com

Disclaimer: This article is for informational purposes only and does not constitute legal advice. For advice regarding a specific legal situation involving law enforcement, consult a licensed attorney.

Sources: Daily Writing Tips — 20 Slang Terms for Law Enforcement Personnel; YourDictionary — Some Slang Words for Police; Police1.com — Law Enforcement Jargon Every Police Officer Should Know; Garmont Tactical — Why Are Police Officers Called Cops?; Wikipedia — List of Police-Related Slang Terms; Slangpedia — Slang for Police; CaseCracker — Police Lingo 101. Last Updated: April 26, 2026