When someone has an uncontrollable case of diarrhea and sprays like someone who drank a bottle of laxatives.
Harry from Dumb and Dumber had some pretty bad Jet Ass.
by dumbdorelele October 03, 2012

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Top Definition
An uncontrollable case of diarrhea that just cannot be held in.
George got a bad case of jet ass after drinking too much prune juice.
by itsmeagainforjetasssame September 10, 2012

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When you keep shitting diarrhea all day and an't control it or clean it up.
Harry got a bad case of jet ass in Dumb and Dumber.
by moviegeek September 08, 2012

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When you keep crapping liquid all day; really bad diarreah. Like Harry from Dumb and dumber.
Yo, my ass is raw cause i had jet ass all day!
by Matt April 09, 2004

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