The bunching up of fat that gathers at the top of one's shoes. It bears a striking resemblance to an ass crack or a woman's cleavage. Often caused by cankles.
Jesus, check out the ankle cleavage on that bitch.

*earth rumbles beneath her feet*
by Dougy Fresh Catalonia May 6, 2007
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1. the space between a pant and shoe
2. a styling technique to showcase perfect ankles
A: I am obsessed with you shoes!
B: Thanks! First I had on wide-leg flares, but I think the outfit really benefiting from some ankle cleavage.
A: Amen!
by flashy1ights August 17, 2015
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