A despicable person with no socially redeeming characteristics. A person who needs his arse kicked.
Bumkicker Slade gave that little fartknocker at the movie house a Melvin.
by Bumkicker Slade May 10, 2005

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Top Definition
A generic insulting noun, coined by Butthead of MTV's Beavis and Butthead.
While they were watching the premier of GWAR's "Saddam a Go-Go" video, Beavis got in Butthead's line of view of the TV. Butthead shouted "Move it, fartknocker!"
by SoulfulZen May 14, 2005

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Originally slang for male homosexual, but the phrase has been used so widely (mainly by second-graders)that it now can mean almost anything.
1. I think Devon must be a fart-knocker. 2. Hey, fart-knocker, your cheating!
by Ben Carmitchel, IL April 25, 2003

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n. someone who is a loser or a moron; used as an insult by Second Graders
SHUT UP! You're a fart knocker!
by Saint Shaggy November 05, 2002

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Reference to anal sex, basically a variant of "fudge packer." Usage hijacked and generalized by the Beavis and Butthead show in the 90s.
Those fart knockers are outside the gay nightclub again having a smoke.
by Janet90232 October 08, 2007

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A semi-derogatory term that is based on a long, popping fart that simulates the sound of knocking; often farted on wooden chairs.
kiss my ass you fartknocker
by Jodayo July 20, 2003

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One who impacts a fart in the rectum with his penis.
"Keep your back to the wall!", shouted Ned. "There is a fart-knocker loose in the museum!"
by bleccch22 March 22, 2010

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A dumb ass
My boss is a fartknocker.
by Fartknocker girl June 19, 2003

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