FGIM Share definition Flag An acronym for "Fuck God It's Monday," similar to TGIF. Guy 1: Ugh FGIM, I partied too hard over the weekend. Guy 2: Monday isn't that bad dude, suck it up. FGIM by Markery May 7, 2011 0 0 Get merch Get the FGIM mug. Buy Now — $32.95 See more merch
