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(Noun) A hand motion where you shape your hand to what looks like a gun and "shoot" yourself because you realized you have or will do something thats worthy of a fail.
Crap, I left my wallet at my ex's house just before we broke up. -Shoots self with a fail gun-

Oh god, Im going to shoot myself with the failgun cuz I forgot it's mother's day.
by ikeeledmyselfsobad August 02, 2009

Words related to Fail Gun

fail gun kill phail shoot