Can you remember when cops were called "pigs"?

[Uncle Joe]

52. According to Wikipedia, Fuzz was first used in the 1920s and pig in the 19th century.

http://en.wikipedia.org/wiki/List_of_slang_terms_for_police_officers

Fuzz
First appeared in the 1920s,[7] corruption of "force" (see above). The term was used in the title of Hot Fuzz, a 2007 police-comedy film.

(snip)

Pig
This derogatory term was frequently used during the 19th century, disappeared for a while, but reappeared during the 20th and 21st century. It became frequently used again during the 1960s and 1970s in the underground and anti-establishment culture. Now prevalent in many English-speaking countries.[18] It is also used in anti-authoritarian punk and hip-hop circles. Oz magazine showed a picture of a pig dressed as a policeman on a front cover.[19]

There is a long list of other names used to describe police all over the world on the link as well.