GBTF Share definition Flag GBTF is an acronym for "Gay Bitch the Fuck??" Person 1: I just yeeted myself off a cliff Person 2: GBTF?...... GBTF by FINNAYEETMYSELFOFFABUILDING March 12, 2019 0 0 Get merch Get the GBTF mug. Buy Now — $32.95 See more merch