Top Definition
when you have gas built up behind your crap and suddenly need to go to the bathroom, and once you sit down u shoot the crap so hard it makes the water splash your ass. anlso known as projectile shitting.
Aw, now my ass is all wet because i was blowing chunks backwards.
by Wolfman (not boy you mofo) January 23, 2009
5 Words related to Blowing Chunks Backwards

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