Smashin' Ass Share definition Flag A posterior which looks awesome in any kind of situation: whether it be jeans, tight pants, thong, pajamas or nothing This is for my gurl Lauren who has a really smashin' ass. You'd swear it was touched by God Himself Smashin' Ass by The_Reaper May 27, 2004 0 0 Get merch Get the Smashin' Ass mug. Buy Now — $32.95 See more merch