An older woman's ass that is rotund and full of cellulite dimples. When they sit down, the ass seems to squish and go all over the place, as if they were sitting on a pile of mashed potatoes.
by ihatebuffering March 06, 2011
When one flexes his or her ass causing multiple dimples to form giving the appearance of lumps like mashed potatoes
by ABlackMan69 November 03, 2010