Top Definition
Part of a woman's body just below the small of the back that curves out to form the top of her ass.
I ran my hand down her back and rested it upon her large ass shelf.
by kahner April 30, 2005
A massive ass that seems detached from the rest of the body and could easily be used as a table.
Her ass shelf was so big you could use it to host a wedding reception.
by Society Against Fat Asses (SAFA) February 05, 2003
any surface at around ass level that serves as a make shift seat. Common types of ass shelves are window sills, arms of chairs, any sort of ledge, and if your creative your friends. As the word "shelf" suggests in the term, ass shelves serve as the perfect place to store your ass when a regular chair just won't do the trick.
Queefy: " Oh hey, who would have known that your arm would make such a great seat! I could sit here for days."
Hoeleen:"Don't look at me...I'm not ok with being your ass shelf!"
Queefy: "Lies...your loving every second of being my ass shelf ;) ! "
by PresOfDaFriends May 20, 2011
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