The male definition of cockblocker is to sabatoge another guys chance of scoring with a chick. This concept was foreign to me until going out on occasion with my college roommates friends.

While one guy was is the bathroom, another guy would tell whatever girl was there things like... its a shame he has been unemployed for 3 years..... rough deal with that restraining order.... he doesn't pay his child support for his 4 kids........he is changing his colostomy bag...it wasn't his fault he caught herpes..... Stuff to that effect.. The girls wouldn't say anything when the guy comes out of the bathroom, the guy of course doesn't score.. then they never even tell the guy that was in the bathroom what they said to the girls.....

Shit is reprehensible..
Steve was a cockblocker when he told the bartender Paul was out on parole when he was in the shitter
by teabag September 12, 2007
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People that making getting some a lot more difficult that it should be.
Everyone I know is a cockblocker. Get a hobby that doesn't affect me, dammit.
by blank June 10, 2003
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someone who prevents you from getting pussy
i hate you, you fucking cockblocker
by G3orgy100 January 28, 2010
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1. One who socially gets between one or more potential couples. 2. A male who prevents another from getting laid by socially getting in the way.
1. I was right about to ask for her number, and then your cockblocking ass had to tell your stupid drunk story.

2. I was about to take her home, and then you had to make the remark about the old cheeseburger under the seat in my car, you damn cockblocker!
by theunknowngl October 17, 2004
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an asshole dude that fucks up your chances of fuckin some bitch
by OnE LoVe August 10, 2003
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A guy/girl, especialy friend or family who intentionately or not stops you from getting laid...it can be done by phone, visiting, etc.
I was about to lose my virginity, when a Maniac friend of mine called to ask if i was watching T.V. Because of that cockblocker I missed my chance...
by I-Maniac February 8, 2007
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What fat and/or ugly girls do to guys who want to hook up with their cute girl friends.
Cockblocking is not nice. Fat girls do it because they can't get any so they get jealous and try to prevent other guys from giving the dick to their thinner, hotter girl friends. If you are a hot, horny girl and your ugly, fat friend tells you that that guy you want to bone is a player and/or has STD's, she's not really protecting you, she's just being a bitch-ass cockblocker cause she don't want you to get laid and be all happy. Cockblockers are messed like that
by PMR February 25, 2003
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