Cock Blocker 

a boy who stops his friend from gettin laid

Talking to a girl guy walks up

Hey Man!!!! Hows your aids <--- He's a cock blocker

Cock Blocker by Bobby Laids alot May 26, 2009

Cock Blocker 

Someone who likes a girl, but who isnt going out with her and he gets jealous and upset that you are talking to her.

James likes Trisha, but james isnt going out with Trisha. When Rob flirts with Trisha, James gets mad and jealous and tries to keep them apart.

Cock Blocker by james poindexter(the ultimate cock blocker) July 12, 2003

Cock Blocker 

A small partition between urinals in a mens restroom intended to provide privacy for patrons.
The origin of this use is often credited to a man by the name of J.D. Sandri.

That strange looking guy was trying to peek over the cock blocker to check out my jungle-junk.

Cock Blocker by MrT SUCKAH December 28, 2005

cock blocker 

a bitch ass, usually a friend, who keeps u from gettin wit a girl either cuz hes: stupid, jealous or both

Me: hey look at stephan and jazmine over there.
Edward: yeah u think theyre gonna hook up?
Me: yeah man it looks that... oh wait theres Tim heading for them
Edward: What should we do??
Me: Lets try to get to Tim before he gets to stephan! Oh man its too late
Edward: What a cock blocker
Me: yup. Moment of silence for our fallen brother.

cock blocker by sharks_pwn February 27, 2008

Cock Blocker 

Someone who blocks cock.

The guy was about to stick his cock into the fine-ass bitch when the Cock blocker came out of no where and side shoved the guys cock.

Cock Blocker by Cock Blocking 101 October 10, 2009

cock blocker 

retarded ass people who clearly see ur trying to get some, and yet they try to stop you for their own pleasure

alonzo is a retarded fucking cock blocker, he busts nuts when he see's u talking to a girl so he tries to insert himself into the conversation

cock blocker by youngpersonfromamerica March 10, 2009

Cock Blocker 

Street term for the female contraceptive device otherwise known as a diaphragm.

Paulina was impregnated by Joe because she forgot to put her cock blocker in that night.

Cock Blocker by Robert Polack May 2, 2008