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One who prevents another from scoring sexually.
Trudy and Dan frequently had time alone but her cockblocking roommate ruined any chances they had to have sex.
by Miss Priss April 13, 2003
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1. (n.) A result of a friend, stranger, or acquaintance making sexual relations or intercouse impossible (by accident or purposely) with a member of the same or opposite sex.
2. (v.) To make the act of having sexual relations with a member of the same or opposite sex impossible (by accident or on purpose.)
1. "Last night I was chillin' wit Shorty at a party, when some dude walked into the wrong room and she didn't feel like doin' it no more...I was an unfortunate victim of cock-block.

2. "Last night I saw James tryin' to hook up wit Jenny and he knows I like her! So, before she left wit him to the other room, I told her that he has Herpes. Next time I talk to him I'm sure he gonna wanna kick my ass for cock-blocking him."
by Jessica January 17, 2005
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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.
by Jake April 12, 2003
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A special door that keeps male chickens from entering a henhouse.
"Dude, that rooster is trying to get at the hens, but the cockblock is keeping him out!"
by Oleg Yavorsky March 22, 2009
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interupting on a buddy or someone while he is trying to get with a girl
Wow, that guy is being a real cock-block.
by Fava October 03, 2005
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Anyone or anything that gets in the way of you getting some. The cock-block can be male,female, or inanimate. Many cock-blocks can't get any themselves so they try to stop somebody else. If they ain't scorin' nobody's scorin'. No scene is too embarassing in their undying quest to prevent your action. If your buddy's a cockblock don't bring him or her.
1. My old boss, Bob is such a cock-block. He won't let any of us guys chat with the female employees.

2. My car was a cock-block. It broke down on my way to the party so I couldn't go and possibly hook-up. I had to wait for the tow-truck to come and tow me home.
by DennisIsEvil February 28, 2006
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1. To interfere with a man's attempts to seduce a woman.

2. abbr. Cockblocker(n.)
I was putting the move on this chick and Ralph showed up and cockblocked me.
by Anonymous February 06, 2003
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