50
A rare and unfortunate phallic affliction where a man is born with a rectangular, block-like penis.
Jane: "What the hell is that? Is that a Colgate box?"
John: "It's...my penis. I have cock block..."
Jane: "Um...ok. Well, this is gonna cost $90."
by duminik November 18, 2010
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51
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 November 30, 2004
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52
What Harry Potter does everytime he sees Ron and Hermione together
by mgemfp208 July 18, 2011
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53
A cock block is when two males are moving in the same girl and the fellow with no chance prevents the second male from advancing on the girl. He cock blocked the second guy and both lose.
This scenerio involves a male "friend" of a girl who continually tries to break the friend boundry while another male moves in on the girl. When the "friend" refuses to let the new guy and the girl be alone, he is cock blocking him. In a way, he is throwing the game for both teams, since no one wins... a cock blocker!
by Penguin September 06, 2003
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54
1. When a person at a club,party or just at school moves in on someone you are trying to get with.
2. Can be used to describe a situation where a friend moved in on your girlfriend who you were trying to get back with.
1. David was trying to get with this girl at the bar but Fabio pulled a total cockblock. Now David is left with his hand.
2. Dude! Cj totally pulled a cockblock when I was trying to get back with Arri.
by BBWulf September 24, 2007
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55
n. one who interrupts an act of sexual intimacy, such as hooking up or having sex, by opening doors, calling phones, etc.

Can also be used in the verb form, "cock blocking"
Yo, homie -- close the door! Why you cock blockin`? Can't you see we're in the middle of sumthin?
by TE AM0 July 26, 2005
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56
A cardinal sin of "guys night out".
Spicy Ray cock blocked me by telling the bitch I was married with two kids at home.
by Boogie February 14, 2004
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