To kick ones back doors in. To have bum sex. to take part in anal activitys.
John boy over there is a fart knocker
by Deepskisam July 16, 2006
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
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
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
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
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
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