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A persons back side which is shaped somewhat like a shovel; a flatt ass; or a long droopy ass.
Yo! That chick does't have an ass, she has a shovel butt!
by mpe~aka~Easy June 14, 2009
A human buttock that protrudes straight out from the lower back creating almost a bench or shelf on the top of the booty.
At Geraldine's cocktail party I sat my drink on her shovelbutt.
by Ron Erickson November 22, 2006