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2.
When girls wear boxers/shorts/pants/skirt with no underwear beneath them. It's the same as when a guy freeballs.
Aaron - "Damn gurl! I want seafood. Where's that fish coming from?!"
Sally - "Oh, I'm freeflapping."
by haphap! January 06, 2010
 
1.
A female wearing no underpants or cover for vaginal and anal area. "Flap" meaning part of clitoris. Like "Free Ball" for men.
I love Free Flapping in the summer, because my pussy sweats.
by Ez G April 11, 2004