slang

[eileenlee]

why are police called fuzz

[JackDanielsU]

Heres on option off an US site

The origin of "fuzz" is uncertain. The expression arose in America in the late 1920s and early 1930s, probably in the criminal underworld. It never quite replaced cop.

Evan Morris, The Word Detective, says:

Where in the world are you hearing people refer to the police as "fuzz"? . . . I have never heard a real person use it, unless you want to count Jack Webb on the old "Dragnet." When I was growing up in the 1960s, we called police officers many things, but mostly we just called them "cops" and we never, ever, called them "the fuzz." As a matter of fact, anybody calling the cops "the fuzz" would have been instantly suspected of being a cop. It would have been a faux pas right up there with ironing your blue jeans.

American Tramp and Underworld Slang, published in 1931, suggests that "fuzz" was derived from "fuss," meaning that the cops were "fussy" over trifles.
A mispronunciation or mishearing of the warning "Feds!" (Federal agents). This seems unlikely.
Etymologist Eric Partridge wonders if "fuzz" might have come from the beards of early police officers. This also seems improbable.
The term is not related to Fuzzy Wuzzy who wuz a bear. (You didn't ask, but the term "bear" for police refers to the Smokey the Bear hat commonly worn by state troopers.)

Evan Morris suggests the word "arose as a term of contempt for police based on the use of 'fuzz' or 'fuzzy' in other items of derogatory criminal slang of the period. To be 'fuzzy' was to be unmanly, incompetent and soft. How better to insult the police, after all, than to mock them as ineffectual?" That explanation seems as good as any, and better than most

[bondy]

from the Bloomsbury Dictionary of Slang 1990 ' either from the likening of a worthless person to mould, fluff ,or dust, or a black reference to white men's head and body hair ' .......well that's what it says!!