Top Definition
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
by The_Reaper May 27, 2004
Sitting around, doing nothing
Me calling my 81 year old father: "Hey, Dad, whatcha doin'?" My dad: "Smashin' ass."
by HeyLazlo July 10, 2011

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