Green’s Dictionary of Slang

fuzz n.1

also fuz
[? SE fuss, which a police officer makes; or ? man with the fuzzy balls under balls n.; note without detailed context senses 1 and 2 can be indistinguishable]

1. (orig. US) a police officer; the police in general.

[US] in L.A. Times 30 Jan. A3: A ‘mob’ can ‘beat a pap’ to the ‘leather’ and get away with it with the ordinary ‘fuzz’ lookin’ on. But it’s a twenty-to-one shot when the ‘cannon copper’s are wise.
[US]‘Boxcar Bertha’ Sister of the Road (1975) 219: The fuzz (the squad)! Ditch the fireworks.
[US]J.E. Dadswell Hey, Sucker 85: ‘Fuz’ [...] is the carnival word for police.
[US] ‘I’ll Gyp You Every Time’ in C. Hamilton Men of the Und. 178: The first thing he’d do was to go to the ‘fuzz’ — the police officer on the midway.
[US]W. Burroughs Naked Lunch (1968) 20: He hangs three fags before the fuzz nail him.
[US]A. Zugsmith Beat Generation 32: Grabbing Jester’s arm, he hauled him to his feet. ‘Leggo, Fuzz!’ the boy cried out.
[UK]T. Keyes All Night Stand 92: The fuzz carting him off when they bust up the riot.
[UK]Nova Apr. 83: The fuzz here is really scared about drugs because of the American scene.
[UK]L. Mantell Murder and Chips 100: Reacted straight away. Said he didn’t talk to fuzz.
[Can](con. 1920s) O.D. Brooks Legs 112: One big fuzz grabbed me by the shoulders.
[US]‘Randy Everhard’ Tattoo of a Naked Lady 105: Lloydie-Boy don’t pay off the fuzz.
[Aus]L. Redhead Thrill City [ebook] Fleeing from the fuzz had made me kinda thirsty.
[US]J. Ellroy Hilliker Curse 31: The fuzz started cracking down on dope-script docs.
[UK]K. Sampson Killing Pool 160: As soon as the sirens started getting closer, and the Fuzz were on the scene, he scattered.
[SA]Mail & Guardian (SA) 30 May [Internet] I ended up in the Dockyard Fuzz (officially known as the SA Naval Police).

2. (US) a detective.

[US]D. Runyon ‘Cemetery Bait’ in Runyon on Broadway (1954) 515: A private fuzz often employed by big insurance companies [...] A fuzz being a way of saying a detective.
[US]D. Runyon Runyon à la Carte 126: A fuzz being a way of saying a plain-clothes copper.
[US]J. Ellroy Hilliker Curse 14: Private fuzz ran pricey. A flatfoot fleet safeguarded me.

In derivatives

fuzzmobile (n.) [-mobile sfx]

(US) a police car.

[US]G. Swarthout Skeletons 125: Balled my baby, had he [...] And killed two guys [...] And dragged a third half to death under a fuzzmobile?
[US]S. King It (1987) 927: Henry fought the dazzle long enough to see the lights on top: it was a fuzzmobile.
[US]J. Ellroy ‘Jungletown Jihad’ in Destination: Morgue! (2004) 328: Jigaboos perched on porches checked our fuzzmobile out.