Mrs.Boney Ass Share definition Flag A miss boney ass is a girl that has a boney butt when she sits on your lap John:i saw that layla was on your lap i she a Mrs.Boney Ass Adam:Nahh her ass is nice Mrs.Boney Ass by Loverbugxoxox November 19, 2015 0 0 Get merch Get the Mrs.Boney Ass mug. Buy Now — $32.95 See more merch