Putting your bare asshole over someone's nose while they are sleeping causing them to wake up from lack of oxygen.
When they wake up, you fart.
Paul passed out the other night from drinking too much bourbon so Randy decided to throw down the assblast asphyxia. Unfortunately for Paul, Randy had some Taco Bell earlier that day causing him to shart all over Paul's face.
by jeffreybruce June 04, 2009
5 Words related to Assblast Asphyxia

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