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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Basically, perorming a cock block on someone, usually a friend, who just cock blocked you.
Drunk Chick: Hey, wanna go out back?

Mike: Sure
Brennan: Mike didn’t you and your wife test positive for AIDS yesterday?

Drunk Chick: ew nevermind *walks away*
Mike: Bro; that was a total revenge cock block
by TheAlwaysCorrect1 December 19, 2021
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(Cock Block) Is when you block a person on social media by sending them a picture of your cock.
by TheUltimateSimpNigha November 22, 2020
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Cock Block:
The action of preventing a male from scoring on a female.
Example:
Hypothetically, at a bar mitzvah, a boy named Ryan and his SO, Harley, are making out. Harley's friend Remy was driving her home. While they were hooking up, Remy lies about them having to leave. This is preventing Ryan from going further, thus a cockblock. In this situation, Remy is a cock blocker, and the action where she cock blocked, was tricking Harley to stop.
Aidan- "Did Ryan get with Harley?"
Graham- "No, Remy cockblocked."
Aidan- "She is such a cock block."
by DAMCANSUELA June 20, 2017
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The friend that you have nothing in common with, but you seem to wind up hanging out anyways. Often interested in space, fantasy games and gaining weight. Forms an impenetrable barrier between you and good looking women.
Wanna hang out with Sam?

That dude is the biggest cock block. Hell no.
by Brainstorm129 January 16, 2011
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A cock block is a place is the imagination where all people other than your spouse have forgotten about your cock for a second.
I've got another cock block coming in 5,4,3,2,1....
by Chest tanks June 20, 2017
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