Cock Blocker 

Some one who stops you from getting a number. the Cock Blocker does this by coming over to you and the other person and completely ruin the conversation.

Jon- So can i get your number?
Allsion-Su-
Cock blocker- So, jon, told her about your AIDS yet? i dont think she'll like that!
Allison- oh wow! cya!
Jon-dick...

Cock Blocker by NothinMuch2BSaid June 30, 2009

Cock Blocker 

when the male is prevented from getting punani due to a third wheel

Meg and Sean was about to get freaky till Missys cock blcoking ass jumped in

Cock Blocker by monet July 14, 2004

cock blocker 

Someone who tries to interrupt you while you and someone are engaging in some sort of sexual activity, usually with something totally meaningless or pointless.

Ooooh, aaaah, hmmmm, unngh (me and my girl getting frisky, hehheh)
*knock knock*
Flatmate:"Wanna cuppa"?
Me:"Fuck off and leave me alone you cock blocker".

cock blocker by Safecracker G October 15, 2004

cock blocker 

to deny intimate interaction between a dude and chick with sexual intentions.

holy crap. dylan's mom is a cock blocker!

cock blocker by jay c June 24, 2004

cock blocker 

A person who tries to fuck up anouthers game.

"Danna is such a cock blocking bitch" - Stiffler

cock blocker by Stiffler November 7, 2004

Cock Blocker 

a chick who interrupts another chick who is already hitting on a guy.

Janie was talking to John when Rachel grabbed him away. Cockblocking bitch!

Cock Blocker by Anonymous May 5, 2003

cock blocker 

A person who tries to stop a person from gettin some .

alonzo is a cock blocker. he introduced me to her only to try to go out with her a minute later

cock blocker by Clinton o February 22, 2009