model butt Posted in M Best definition model butt A small, but soft/squishy/supple rump on a skinny person. Models diet, but don’t work out. Hence, model butt. OMFUG, your butt is _so_ squishy. You have a total model butt. Continue never exercising. How satisfied are you with the definition? Looking for model butt meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 107 times.