Rumptacious Share definition Flag A woman's tight ass that looks like perfect juicy rump roasts that are delicious enough to devour yet jiggles when getting fucked. I would love to slam into Jessica's sexy rumptacious with my dick. Rumptacious by Pursiaxoxo July 21, 2017 0 0 Get merch Get the Rumptacious mug. Buy Now — $32.95 See more merch