One night when you and your'e friends go around and try to ruining the awkward public sex of two random people, usually in a car.
Jordan: Will you look at fucking that, the car over in the parking lot is rocking and all steamed up. Do you know what time it is?
Frank: Cock Block Army (CBA) time.
by bowser3 April 28, 2011
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when someone offers a girl a ride home in an overcrowded car with the intention of preventing consensual sex
the night was over and everyone was leaving and then miraculously she was offered a ride home in a 4 seater with 7 passengers by a master at the clown car cock block
by alwaysangry December 1, 2009
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Cock block awareness day falls on the September 12th of every year.
John: "Hey, did you hear about tomorrow? It's Cock block awareness day."
by Kegmeister September 13, 2012
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Named after the famous Great Dane; it is any dog the gets in the way of love making and flirting of all kind purposefully or inadvertently .
Guy: Man, I think I have blue-balls. I was about to get some last night, until her dog came in and started barking waking everyone up.

or

Guy: Man, I think I have blue-balls. I was about to get some last night, until her dog came in and wouldn't leave her alone

Guy 2: I'm sorry, damn Cock-blocking Scooby Doos
by rissie2q January 20, 2013
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v. to prevent ones friend from engaging in sexual activities by use of electronic means ie. facebook, myspace, AIM, YIM, Email, MSN
Random guy :"Broseph, what the shit. Why did you post that shit on facebook, you're totally e-cock blocking"

Javier "Yo man i totally just played tonsil hockey with this chick"

Dustin "haha dude im so gunna post that shit on facebook"

Javier "dude you are such a douche for e-cock blocking me"
by No you do February 24, 2009
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