Acronym of the phrase, "...the fuck? Shut up!" Formed by eliding the word "what," as in "What the fuck? Shut up!"
Some definitions attribute this wording to
Yoda, of Star Wars: "This is how Yoda would say STFU" (acronym for "shut the fuck up"). However, this
definition is obviously borne of an incomplete understanding of the Yoda speech pattern. A moment's reflection
will confirm that Yoda would say, "The fuck up, shut," or "Up the fuck, shut."