The unfortunate consequences of an improperly executed fart lighting. This is where the noxious gasses ignite within the ass and create a terrible, terrible mess.
"Why are you in a wheel chair?"
"When I was a kid, I had a fart lighting mishap, caught some ass backdraft, and burnt the lower half of my body right off the bones."
by Craig McRae July 17, 2006
The unfortunate event that occurs while taking a dump, & upon impact the dookie jettisons a drop of toilet water up one's poop shoot.
I was having a great shit until I got terrible ass backdraft. They need to put less water in the toilets, or make them taller. shit.
by Harrison Bergeron July 16, 2006

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