To flatulate - or fart.
Joe and Seth were driving when Joe smelled something gross and asked Seth if he blew ass in the car.
by Laser Luv May 13, 2007
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Totally or outrageously ridiculous...causing anger or contempt.

OMFG! Are you serious? You got a D...yea...that test blew ass rockets!
by mandaz March 15, 2006
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a phrase used to describe the experience of complete surprise or shock so great that your rectum can no longer contain itself. Used to reference something in a positive, but unexpected way.
Dude, the ending of "Lost" last night blew my ass out!

That Rocky's burger was so good it blew my ass out.
by Toddy D April 12, 2007
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"My damn car blew out it's ass last night."
"Nick Willis really blew out his ass in the 1500 meter final!"
by F.O.B number 1 April 17, 2013
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