A woman's nice yummy buttocks. Usually young and plump in nature. They come in all kinds of shapes and sizes. When in the field of vision of a Yum Bum it drives you wild. Almost to the point of biting your lips.
Whippersnapper: Hey Sammy, look at those delicious Yum Bums. Looks so nice I almost bit my lip.

Whipper's friend: Yes I agree, those Yum Bums are the tops.
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by Whipp3rsnapp3r April 14, 2019
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