(US, slang) A police officer who patrols the streets on foot (walks the beat)

Alternative form of silent policeman

A justifiable or reasonable capture or apprehension; also, broadly, a just or inescapable accusation.

Alternative form of cop-killer

(US, colloquial) disrespect shown to a police officer

(US, Canada, slang) An officer of a fish and wildlife conservation commission.

(slang) A loud, hard knock at a door.

plural of cop knock

(transitive, Britain, slang) To successfully engage the company of someone for a period of time.

(Ireland, informal, idiomatic) to cop on, stop behaving immaturely