jstfufo Share definition Flag An extension of stfu, meaning Just Shut The Fuck Up For Once. Person 1: blah blah blah blah blah... Person 2: Dude! Jstfufo! jstfufo by nirvana4lf December 26, 2008 0 0 Get merch Get the jstfufo mug. Buy Now — $32.95 See more merch
