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
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
Cock Blocking is when someone or something prevents a man from "getting some" or "hitting that"
I was about to take Jamie back to my place to seal the deal but I was swiftly cock blocked when my friend Mike didn't have a ride home.
by Sean Feeney August 06, 2007
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
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
noun: Someone who prevents a man from having any chances with a woman.

verb: to prevent another from having relations with a woman.
"Brad is such a cockblock."
by Sir Thomas Aquanis April 27, 2010
Someone who messes with your sex game!
Someone who stops you from getting pussy on purpose!
Man, that dude is a cock block!
by Rick-Chizzle January 28, 2009

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