Definitions by Conundrums

STF 

An acronym for an expression of diappointment or disillusionment meaning, "So That's Fucked."
Usually in response to receiving news about something.

Female #1: "I was really starting to like that guy, but then I found out he was gay."
Female #2: " Dang-- STF!"

STF by Conundrums May 27, 2009