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Used frequently as an insult, Cock Knocker refers to a person of either sex who grabs or pats a mans crotch. The act of Cock Knocking has two meanings: 1) A way for one male to congratulate another male similar to American football players patting each other on the rear. or 2) A sexual advance toward a male by a person of the either sex.
by JediAndi April 04, 2003
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a cock knocker is a person(s) that is gay, homosexual or a plain old dickface
see (knob Jockey) for fether definition of cock knocker
by Alex Walters March 24, 2005
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A really dumb guy. The kind of exceptionally dumb guy who whacks his hardon against door frames and shit, literally knocking his cock.

Especially applicable to a guy who sucks, yet has a rad girlfriend.
"Ditch that guy, like yesterday. Your boyfriend is a fucking cock knocker. You could do so much better. Like me."
by Danny Delinquent March 29, 2005
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This happens during a threesome (2m&1F).
If one guy is up the ass and the other is up her flange. Both guys can feel there cocks knocking against each other.
This also can apply if the 'double A/double V' method is being used!

Jane could feel them both inside her, they were a couple of cock knockers.
by Minges and all! April 15, 2003
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A homosexual who engages in very aggresive sexual contact, consensual or not!
Holy tits tom, you won't believe it! Jebediah just got viciously hand raped in the park by that serial cock knocker. Is he alright? No, he got ass fucked aswell.
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Any non-penetration act in which the male penis (as opposed to those weird female penises i saw on TV... yuk!) comes into contact with a hand. Most likely but no tlimited to:

-Someone who makes frequent attacks to the cock

-Someone who fondles the cock

-Someone who loves the cock

-Someone who jacks off the cock (not their own)
by Gumba Gumba February 27, 2004
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