Thickamas Share definition Flag Thickamas is a word you would say if a girl has a fatty booty so instead of gyat you would say thickamas. “look over there brian she got a THICKAMAS”“Dude did you see kylie over there she got a thickamas” Thickamas by miss certified May 20, 2023 0 0 Get merch Get the Thickamas mug. Buy Now — $32.95 See more merch