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2.
One of the dozens of slang terms used by Beavis and Butt-head. Buttknocker could refer to
a)A homosexual, as anal sex is the only form of intercourse for gay men, or
b)An erection in somebody's ass, referring to pulling out and then tapping and wiping the semen on said ass.
Beavis: Shut up, Butt-head! I'm gonna play drums on your nads with my foot!
Butt-head: I'd like to see you try, buttknocker!
Beavis: Don't call me that, Butt-head! (Beavis kicks Butt-head in the testicles)
by dilary huff April 24, 2008
 
1.
1.) Term made popular by Beavis and Butthead.

2.) One who exists to knock on ass. Arguably an accusation of homosexuality.
Beavis: Heheheh, move bunghole!
Butthead: Uh, shut up buttknocker! Uhuhuhuh.
by C2Y October 03, 2005
 
3.
Adj.

A man or women who has tons of buttsex
Shut up butt knocker! Go find another victim
by Rob T January 15, 2004
 
4.
-One who is an anoying pest.
-used to describe Little sibbling
-Any one you are angered with
"Miley Cyrus is a butt-knocker
by BAA-A-A_____I'M_A_SHEEP!!! April 27, 2009