An adaptation to STFU, which has included a "fucking" to it. Basically translates to "Shut The Fucking Fuck Up!" Has no real purpose except to emphasize that you want the certain someone(s) to shut up.
by monkeygodkiller August 17, 2007
by JEFF_HARDY_GIRL April 25, 2010
Jakki: "So I heard this really funny joke yesterday! But... I forgot it. It was really good though."
Calvin: "Dude, stffu, why don't you stop eating so much sugar and go jump off your roof and try to fly"
Calvin: "Dude, stffu, why don't you stop eating so much sugar and go jump off your roof and try to fly"
by Batmanxisxrad October 15, 2008