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When you take a piece of wooden furniture from a curb alert you find on craigslist.com, smash it, take the largest piece and spray paint a cock on it, then leave it in your friends yard.
Lets leave a cock board in Sean's yard.
by puebloCO November 22, 2010
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3
A cock board is when you stick a dildo on a skateboard.

"cock-boarding". Fucking the dildo while its on a skate board
Wanna sit on my cock-board ?
by tigwig April 06, 2011
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