GFID Share definition Flag 1. An acronym for God Forgives I Dont Guy #1: Please dont kill me dude, I didnt even want to sleep with your sister... she came onto me! Guy #2: GFID motherfucker.... GFID by l33t shit October 3, 2005 0 0 Get merch Get the GFID mug. Buy Now — $32.95 See more merch