JOE MAMA FAT Share definition Flag joe mama fat is used as an insult when you feel bad about calling someone gay lol. Person 1: "JOE MAMA FAT LOL" Person 2: "... *CRIES*" JOE MAMA FAT by THE.FAT.BITCH.MF. March 15, 2021 0 0 Get merch Get the JOE MAMA FAT mug. Buy Now — $32.95 See more merch