that rump is roasting Share definition Flag When a person's bootyis so big and popping out of their jeans, that a person finds it attractive. Hey check out Lisa!! That rump is roasting and her ass is fine! that rump is roasting by JoyceeT June 23, 2008 0 0 Get merch Get the that rump is roasting mug. Buy Now — $32.95 See more merch