Top Definition
An acronym for "I just threw up." IJTU is like LOL for when you're disgusted by something. Primarily used in email/IM situations.
Person A: dude...i was digging around in the trash looking for my car keys, and put my hand into a big pile of maggots...NASTY!

Person B: IJTU
by abloom227 April 26, 2009
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