In no particular order:
Cartoons: Looney Tunes, Tom and Jerry, Tex Avery (everything).
Stand-up: George Carlin, Rodney Dangerfield, Richard Pryor.
Stage or screen: Three Stooges, Marx Brothers, Andy Clyde, W.C. Fields, Lucille Ball, Jackie Gleason, Redd Foxx, Carol Burnett, Bob Newhart, Don Rickles, Don Knotts, Tim Conway, Peter Sellers, John Candy, Chevy Chase, John Belushi, Steve Carel, Tom Green, Sasha Cohen, Chris Farley
Movies: Duck Soup, Some Like It Hot, Plan 9 from Outer Space, The In-Laws (the original w/ Peter Falk and Alan Arkin), The Out-of-Towners(the original w/ Jack Lemmon), Dr. Strangelove, The Party, Spinal Tap, A Mighty Wind, The Gods Must Be Crazy, Serial Mom, Blazing Saddles, Office Space, 40-Year Old Virgin (and many more...)
TV Shows: McHale's Navy, Benny Hill, Taxi, Cheers, The Office, Seinfeld, Black Adder, The Carol Burnett Show, In Living Colour, early SNL, Three's Company.
Books: Pranks! (RE/Search Vol. 1), The Devil's Dictionary (Ambrose Bierce).
Radio: Phil Hendrie, Howard Stern (in small doses), Talkback w/ Bob Larson (this aired on AM radio back in the 90s).