a cock block is one hell of an ugly mother fucker that knows he/she cant get ANY... not even from a lepricon so they hang around people about to fuck
victom of the block: dude, your room mate is a fucking COCK BLOCK!!!
depresed room mate: yea i know, lets take him out back and beat him with rocks then with our dicks
by victim of the blockage October 21, 2003
a cockblock is when one guy is trying to get some from a girl an there together an anohter guy comes in a aslways ruins it ; maybe on purpose maybe not it doesnt matter
Your being a cockblock im trying to get some.
by RJ FLeming June 24, 2005
When some dude is about to fucking rail you in the ass, but you slide your hand in at the last second to block the cock!
He ripped off my pants and bent me over, but I pulled a cock block.
by Randall March 05, 2005
to knowingly take one persons efforts with the opposite sex and substitude the first person with ones self
i was hitting on this fine woman and this guy cockblocks me and steals her from me.
by raul January 16, 2003
Cock block refers to an individual (primarly male) who constantly keeps the penis limp. In the process of trying to get a girls head down your pants or any other type of that activity; there is one other cockblock present who keeps you from getting any poon to speak of. A Cockblock would be known to never get anything but a big stick in their face.

See Luke Patola (prime cockblock-ideal example)
Kent- "Carley do you want to go in the bedroom"
Carley- "Yeah sure"
Luke- "I'll follow!"
Kent- "Your a Cock Block Luke"
by jasen ball April 05, 2007
To provide a metaphorical, but quite effective, block of your friends cock with a woman's vag!
"Yo Bob, that fuckstain kid Doyle, just cockblocked me from getting another piece of ass!"

"What a cockblock!"
by Omanz December 28, 2005
A person who stops you from getting pussy, a piece of ass or punaner.
Hey thanks for attending my wedding."my friend said.
"Thanks, this was all about thanks? Fuck! Your welcome cockblock! I shouted.
by Snipes ur Ass March 14, 2004

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