Cock Block

When you're about to score but someone ruins it for you.
Can be ruined for one or both parties.
Mood killer.
Best described with an example.

Haley and her boyfriend Andrew were having phone sex when Andrew's brother James walked in.

Andrew: Then I'll take off your shirt and your bra and bite your neck and pull your hair
Haley: I'll take off your shirt and your pants and get on top of you and start biting your neck softly
Andrew: Then I'll move down to your stomach and take your panties off and I'll start to eat out your pussy

Haley: Next I'll take your boxers off and kiss your dick, I'll get on my knees and start sucking your cock
Andrew: Mmmmmm, Baby, what's next?
Haley: I think that's up to you;)
Andrew: I want you to suck me until I'm rock hard and about to explode. Then I'll get on top of you and pin you to the bed and start to put rock hard cock in your tight, wet....
James: Hey man, what's up?
Andrew: You fucking cock block!!!
James: Who are you talking to?
Andrew: Haley!!! We were having a good time!!
Haley: Tell you're brother he fucking ruined it!!!
James: YOU'RE WELCOME
Andrew: Get out James!!! Baby, I'm not horny anymore. I'm sorry my brother's a fucking cock block.
Haley: Ugh, neither am I. Tell him that I'm fucking pissed at him.

by LoveLoveLove27 July 06, 2010

cock block

a friend (usually male) that will not allow one, to sex up someone else (usually female)

Man, why did that asshole cock block me last night, she was so drunk I was gonna get some.

by angle December 01, 2004

cock blocking

the art of being a jackass who can't guide his own 1" punch to the landing strip so that person has to de-rail your train

jack and jil went up the hill to do it...... but little did they know that the bucket fell cock blocking jack

by funny truth September 06, 2008

cock block

preventing a hot chick from hooking up with a man on a one night stand by making an ass of yourself

a job usually taken by she-beasts and grenades

by Da Nastee One May 07, 2004

Cock Block

A person(little sibling, parent, etc.) that prevents intercourse or oral sex from occuring.

"Dude, I would've gotten a blowjob from Linda, but my little sister wouldn't go downstairs, what a cock block!"

by Herbert Baldwin February 06, 2009

Cock Block

Cock blocking is when a man is interested in having sexual relations with a female and is interrupted by a 3rd party making the chances of him having sexual intercourse with female much harder.

Kristen is cock blocking

by TT203 December 05, 2011

cock block

Someone who interferes with action you have already set up.

Erin cock blocked the threesome that was already in motion.

by Billy Blue Balls July 12, 2003