1. to make the butt cheeks purse together 2. to situate onesefl so that surplus butt pops over the top of one's pants
When a girl with a big butt sits on a barstool with her thong all "accidentally" hanging out.
de Amber 18 janvier 2004
Top Definition
The space between the cheeks of your butt,when the cheeks are squeezed together. Particularily sexy when a female is wearing ultra low rise jeans, and exposes just a little of it!
Wow, did you see the butt cleavage on her dude!
de Jeff Gawrys 29 octobre 2003
When you can see the top of a male swimmer's butt crack because his speedo is too small or too tight. Can be sexy on hot college swimmers.
-Joe needs a bigger suit, he has major butt cleavage.

Girl: Ooh, check out that swimmer!
Girl 2: Wow yeah, he has hotttt butt cleavage!
de SwimmChick247 5 décembre 2010

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