flat-ass broke Share definition Flag When you get so broke that eating nothing makes your ass skinny. Guy #1: Daaaamn, girl got no back.Guy #2: Why dat?Guy #1: She flat-ass broke, man. flat-ass broke by RockStar2012 March 1, 2011 0 0 Get merch Get the flat-ass broke mug. Buy Now — $32.95 See more merch