fgdm Share definition Flag Stands for Fat Girl Defense Mechanism. The bitchy vibe some big girls emit in order to avoid being talked to. I tried to be nice the the big girl in the library but she threw up her FGDM on me. fgdm by pugsx3 April 24, 2008 0 0 Get merch Get the fgdm mug. Buy Now — $32.95 See more merch
