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.
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
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
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!"
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.
Someone who interferes with action you have already set up.
Erin cock blocked the threesome that was already in motion.
When a someone you know prevents you from looking good in front of the ladies
Jon Dejesues
aka animegamer