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15.
the male version of the word cunt. A cock knocker is a male who needs to be called the worst word you can come up with. He is the kind of man that if he were a woman you would call a cunt. He is the kind of person that will relentlessly take the wind out of you, deliberately sabotage you, and sometimes even seems to enjoy being hated.
My professor is such a cock knocker! He said that all the girls in the class may as well drop because they won't pass anyway! GRRRR... I loath that mo-fo!
by ismirth June 02, 2007
 
1.
Mild insult, popularized by Kevin Smith movies.
by Anonymous October 07, 2003
 
2.
N: One who randomly strikes people in the testicles. Often on a daily or hourly basis.
Billy is a cock knocker. He hit me in the balls everyday this week.
by Alex December 05, 2003
 
3.
One who is a complete idiot or retard. Someone excels at pissing the shit out of people. Some people may hear this when pking with Nightmarerh. One may also here the words "Bunghole" "Motherfucker" or occasionally "Hippy Ranger"
You: "Dude did you see me just pwn the narb" He lost a fucking sara sword man!"

Other guy: "Holy shit man that was Nightmarerh you better log bro!"

Nightmarerh: "AHHHHHHHHHHHHHH MOTHER FUCKING COCKKNOCKER HIPPY RANGERS" FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUCK!!!
by The Ending August 20, 2010
 
4.
Mark Hamill's part in Jay and Silent Bob strike back.
Now whos balls have been busted bitch? BONG!!
by FhillyMan October 12, 2003
 
5.
1. One who knocks cocks. 2. Someone who is a complete idiot or clutz. See jerkoff.
You're such a stupid cockknocker!
by Do me big time May 23, 2003
 
6.
An individual who exudes an aura of extreme fuckwittery!
Bruce is a right Cock Knocker!!

Yeah what a fuckstick!
by Maverick 293 October 23, 2009
 
7.
one who llikes to go cock-knockin' ie, a male who prefers cock to pussy
or, in jest, a way of calling your friend an asshole
that guy's a total cock-knocker

man, you cock-knocker! where'd you score THAT? that shit is PROPERTY, man!
by celestia March 14, 2003