Flappy gum ass mother fucker Share definition Flag When someone talks so much everything that they talk is shit and they fuck their mother “Hey bob” “yea” “shut your flappy gum ass mother fucker up” Flappy gum ass mother fucker by Ferelliekos September 23, 2020 0 0 Get merch Get the Flappy gum ass mother fucker mug. Buy Now — $32.95 See more merch