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1.
The ass equivalent of projectile vomiting.

The act of dropping trou, spreading one's asshole to the point of tearing, and then unwillfully surrendering to your sphincter as it sprays liquified poo in a multi-angled assault.
Guy #1: Dude, you hit that oyster bar last night?
Guy #2: No.

Guy #1: Good thing, man, cause those crustaceans had me spraying deuce all night long.
by RabbiBrowstein March 29, 2010