rump roastin' Share definition Flag The act of a skinny guy riding a morbidly obese female. redneck men are known for this act. Damn, check out cliff, i'd really like to see those two go rump roastin' rump roastin' by ballsmacker March 13, 2013 0 0 Get merch Get the rump roastin' mug. Buy Now — $32.95 See more merch