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10.
1. One who socially gets between one or more potential couples. 2. A male who prevents another from getting laid by socially getting in the way.
1. I was right about to ask for her number, and then your cockblocking ass had to tell your stupid drunk story.

2. I was about to take her home, and then you had to make the remark about the old cheeseburger under the seat in my car, you damn cockblocker!
by theunknowngl October 16, 2004
 
36.
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!
by Anonymous May 05, 2003
 
37.
A male in a group of female friends who's job is to stop other males trying to score with the females in the group. Done purposely because the girls either already have a boyfriend or just don't want to be annoyed that night.

The cock-blocker can be either a male friend, or someone hired (almost like a bodyguard).

Popular methods of the cock-blocker include:
* Switching places with the female.
* Grinding with the offending male.
* Kissing the female to let the male know she is unavailable.
* Jumping in between the male and the female.
* Shoving the male, or squaring up to him.
* Warning him off with gestures.
John became the designated cock-blocker for the night after Mandy decided to go out with the girls and didn't want to be pestered by guys.
by Cock-Block-Pro March 28, 2009
 
38.
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...
by NothinMuch2BSaid June 30, 2009
 
39.
A female (usually unattractive, or socially "defective") that stays with her more attractive friend at a party and "looks after" her friend, or just sometimes gets in the way of her friend socially. Often times a young (not necessarily) male would be after the friend.
Male #1: D'you see Jenny las nigh'?
Male #2: Yea, D'you see tha cock-blocker she was with?
by Jupiter, an don forgetit October 12, 2005
 
40.
COCKBLOCKERS ARE BOYS WHO STOP THEIR FELLOW BROTERS FROM GETTING SOME PUSSY
I WAS ABOUT TO BANG THE HELL OUT OF MY FAT SISTERS HOT ASS FRIEND , WHEN THE COCKBLOCKER,MY BROTHER CAME INTO THE ROOM , AND TURNED US BOTH OFF.

NEXT TIME HE DOES THAT I WILL DUCK TAPE HIM UP AND THROW HIM IN THE SHED OUTSIDE IN AN OLD BOX. =]
by NIKKI JOSEPH LAROUSSE June 10, 2009
 
41.
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.
by Robert Polack May 01, 2008
 
42.
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.
by sharks_pwn February 27, 2008