Top Definition
N.- When a girl's cleavage is drenched in sweat or hot for any particular reason. It is able to pop popcorn in their breasts.
A definite turn on for guys. ;)
Meghy: Hey Mike, guess what?

Mike: What?

Meghy: Rach's cleavage is so hot it's popping the popcorn.

Mike: POPCORN CLEAVAGE! *drools*
by Mr. Manson6661 XOXO July 09, 2010

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