Top definition
The human chin, esp. in reference to fellatio or tea bagging.
Jay Leno has quite a large ball shelf.
by Zevatron December 26, 2006
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2
The roll under a woman's chin that even slim women have due to performing too much oral sex with a man over the span of time.
I love getting head from Alisha; she has a very comfortable "Ball Shelf" on her.

Damn girl, you really need get that "Ball Shelf" waxed. This blumpkin just isn't as enjoyable as usual; I hope you get backwashed.
by Heelfigger January 05, 2009
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The vengeful act of crapping on a lover's chest while they sleep.

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