stifoo
see STFU - homonym for STFU (shut the fuck up)
stifoo u friggin noob
stifoo
the phonetic prononciation of "stfu," or "shut the fuck up."
Guy 1: "Hey man, Justion Bieber is an awesome singer!"
Guy 2: "Dude, what are you talking about??? Stifoo!"
Guy 2: "Dude, what are you talking about??? Stifoo!"