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 4, 2009
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An unwelcome case of particularly explosive diarrhea.
"Sorry about your toilet bowl. I had a harsh case of Assblasters Syndrome."
by Beertaco420 July 21, 2021
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Basically someone who has no qualities of understanding that its not the best idea during the time, but you go with it anyway cause you have no concept over how to be a "responsible adult" and you bitch about anything because your in a position of power.
Example:

God that Donald trump is an assblasting bitchaloid!
by maxwhite July 27, 2017
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Swift punch to the asshole heaving the receiver sore
Jen was so mad at mark she gave him an assblast and walked home
by LCGAtes December 31, 2021
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A swift punch in the ass leaving the receiver sore
Jane was so made at her boyfriend she assblasted him and walked home
by LCGAtes December 31, 2021
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Cumming so much in a girl's butthole, it pours out.
Five minutes later, the assblast filled her up like a red solo cup.
by sospedecial February 1, 2017
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