cock blocker 

a person who causes another person to not get some

Gosh he was about to get some but his ex-girlfriend Rachel is such a cock-blocker

cock blocker by Bam Bam February 18, 2005

cock blocker 

Someone or something that prevents a man or woman from getting fucked. Usually a cockblocker is a friend of one who is trying to get his/her fuck on.

Nick to Shelly: "Jesus is a cockblocker!"

cock blocker by shelly September 27, 2004

Cock Blocker 

used to describe someone who will do all they can to stop a man from hooking up with a girl
(could be referred to homosexuals also)

Man, I could of hooked up with that hot girl I was talking to tonight but my ex was all over me. She's such a cock blocker!

Cock Blocker by vakdra November 25, 2003

cock blocker 

Insecure male that horns in on any developing interaction another male has established with a female, an extremely embarrassing and pathetic event to watch. Cock blockers can also be a "cow herd" of "fuglies" around an attractive female they desperately cling to for a false sense of enhanced social status.

Despite Randy being a horrible cock blocker, Sarah still slipped Matt her phone number just before her cow herd enveloped her once again.

cock blocker by Ponderpoint February 28, 2008

Cock Blocker 

a guy/gurl who is a punk ass that stops a person from getting someones number or hooking up with them,also an annoying person who doesnt leave u alone when ur havin conversation with some one

neo ur a tru cock blocker

Cock Blocker by Phantom October 11, 2003

cock blocker 

a lesbo or capet muncher would not allow any men to get some ass from her friends

Jenny s a real cock blocker,she would not let her friends get any ass till she get some first.

cock blocker by BLUE December 24, 2002

cock blocker 

Cock blocking is not always a bad thing. Sometimes it is necessary to keep a friend from getting ass that he wouldn't normally go for, but he is to fucked up to know better.

Ben was so fucked up that he was trying to get with a fat ugly bitch, so we cock blocked him to keep him out of the nasty.

cock blocker by Mike March 31, 2003