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A proxyblock is a form of cock block in which the actions of one member of your party does something particularly foolish, stupid or otherwise worthy of being called a douchebag that fucks up the game for your entire crew.
Jake "How'd the club go?"
Rick "We got proxyblocked by Tommy"
Jake "How?"
Rick "He came in with us wearing leather pants"
by Dr. Dook June 13, 2009
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