Top Definition
A butt that sticks out so much you could use it for a shelf.
She had such a shelf-ass she could carry the groceries in without using her hands.
بواسطة Scott Henry مارس/آذَار 6, 2008
When one's ass, usually larger female's, stick so far out horizontally that it may be used as a shelf to place items on.
"Hey dude, have you seen my drink?"

"Oh broski, I left it on that bitch's shelf ass ahead of us in the line in Wal-Mart."

"What the fux, bro."
بواسطة SpykeIzLeet أغسطس/آب 20, 2011
Where the back and butt of a person seem to intersect at a 90 degree angle forming a shelf. For which one can rest an arm, cup, or book, like a bookshelf.
DAMN! Check out that shelf-ass on that ho, I could rest a cup on it!
بواسطة brandy kim إبريل/نَيْسان 18, 2011
When someone is really really fat and their ass sticks out and it looks like a shelf. You can put pictures, lamps, or even write a paper on it.
Fat big assed people, usually woman
بواسطة Jason فبراير/شباط 20, 2005
A women's ass (usually black women) who's top of the ass cheek is so big it can be used as a shelf.
Damn that bitches shelf-ass is so big it could be used as a table top cup holder.
بواسطة Anonymousshelfass إبريل/نَيْسان 13, 2016
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