Copper

Copper (noun / UK slang)

(Also shortened to: Cop; related: Coppers for small change)

Definition: A police officer. It also refers to loose, low-value bronze coins (1p and 2p pieces).

Pronunciation: /ˈkɒp.ə/ (rhymes with proper)

Where It Comes From: There’s an old myth that police uniforms in New York or London had copper buttons, but that’s just a tall tale.

It actually comes straight from the old British verb to cop, meaning to catch, grab, or seize (which traces back to the Latin capere via Northern French slang). A constable was quite literally “the one who cops” bad guys. By the mid-19th century, criminals and working-class Londoners were calling them “coppers.”

For loose change, the name simply comes from the metal itself—pennies and tuppences were originally made out of solid copper.

How People Actually Use It: You’ll hear it across every corner of the UK, from gritty crime dramas to everyday street banter.

People usually drop it when warning someone to watch their speed (“watch out, speed camera van ahead, coppers are hiding round the bend”), or when talking about sirens blaring down the road on a Friday night. It isn’t inherently an insult like some other anti-police slang, but it’s informal enough that you probably wouldn’t address a sergeant as “copper” to his face unless you fancy making your day a lot more difficult.

Examples in the Wild:

• “Slow down through the high street, there’s a copper parked up by the petrol station.”

  Translation: “Reduce your speed; a police patrol vehicle is monitoring the road.”

• “I emptied my pockets at the end of the week and it was just full of heavy coppers.”

  Translation: “I had a pile of loose one and two-pence coins taking up space.”

• “He panicked and legged it over the back fence the second he saw the coppers turn the corner.”

  Translation: “He ran away immediately once law enforcement officers appeared.”

Similar Slang: Rozzers, Old Bill, Fuzz, Pigs, Plod, Bobbies, 5-0