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 blockus 

When in a game of blockus you block another players move by using the cock shaped piece (upside down T). Also can be said any time you play the cock piece.

I had the game in the bag then Smitty went a cock blockus-ed my. What a shit head!

cock blockus by rat killah June 17, 2009

Auto-cock-blocker 

1. A straight female that has something about her that automatically prevents her from getting sex.

2. A straight female that always says or does something stupid that prevents her from getting sex.

1. Stacy has a mustache thicker than her boyfriend's. She's not gonna get laid; that's a turnoff. She's an auto-cock-blocker.

OR

2. Tracy is so pretty, but she's weird! She says random stuff like "my hamster talks to me at night." When boys hear that, they freak out. She's an auto-cock-blocker.

Auto-cock-blocker by PrincessR December 8, 2009

kitty cock blocked 

You and your lover are making your way to the bedroom, about to embark on a ride of sweet, passionate love making when you find your cat sleeping on the bed. This consequently denies you from sex since cats are too damn cute to be disturbed from their slumber.

"We were totally getting into it so we decided to take it upstairs...but we were kitty cock blocked by Fluffy."

kitty cock blocked by beargryllsbornsurvivor August 25, 2012

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