1. To prevent a male friend or associate from getting some action.

2. Any such attempt to prevent a male friend or associate from getting some action.
1. Damn, Johnny just totally cockblocked his roommate. Ass.

2. OK, Isaac's making his move on Clarisse in the living room, and the game is on in fifteen minutes. We're going to have to attempt a cockblock.
door Jake 12 april 2003
1)Any person or group of persons interfering with an attempt someone is making to have sex with someone else.
2)The City of Pittsburgh.
3)That twitchy guy who just ruined the mood.
Joe, John, and Harold tried to cock block Steve, but it didn't work.
door Hung Lo 1 mei 2003
A person who blocks the action of a guy trying to make a move on a girl.
**sitting on the couch**

Dave: Hey hallie, your very pretty.
Hallie: why thank you.
*dave leans in to kiss her*
*sarah walks in & sits in the middle of them*
Sarah: hey guys! nice night? yes?
Hallie: WHY ARE YOU COCKBLOCKING?
door hahhahh hallie. 6 april 2009
When you are denied or blocked from sexual activity or arousal
Bertha's brother came home early, what a cock block.

Rita's Dad stayed in the same room watching TV with us, he is such a cock blocker.

The girl next door closed her blinds before she start to change, what a cock block.
door RuneX 2 december 2003
When your hand is down your girlfriend's panties and your mom walks in.
Got cockblocked by mom last night. Amy said she was ready to go all the way, but she went home instead and I got grounded. I might be a virgin for another week yet.
door MrKapper Is Back 12 december 2012
An application that chat roulette needs to add that literally blocks cocks from the screen. This would entail a cock-identifying application that would need to work better than facebook's face recognition feature. It would also cut down on 90% of chat roulette users.
He was going to flash people on chat roulette, but the new application cock blocked him. He's gone back to flashing girls at parties.
door Architect of Destruction 22 november 2010
someone who prevents others from pulling
(doing a mark)
Guy - Hey, do you want a drink?
Girl - Yeah, sure
COCK BLOCK MARK - YEEAAAH, THREE POINT ONNEEE
Girl - *Leaves*
door Anonymouswindsor3.1 27 oktober 2010
- third party that keeps you from engaging in sexual activities with that special someone in a given amt. of time.
I can't believe her. She could obviously tell we wanted to do stuff. She's such a cock block.
door Poseur 3 december 2005

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