Many police-related slang terms exist for police officers. These terms are rarely used by the police themselves.
Police services also have their own internal slang and jargon; some of it is relatively widespread geographically and some very localized.
divvy van: police vehicle used to transport criminals around
Meat wagon is the name given to ambulances in the UK
Noun, British slang, a policeman
An' since when did "legitimate" businessmen an' Five-Oh make nice?