Freeflapping
The female equivalent of freeballing. Wearing no underwear.
James: Did you get your underwear off of my floor before you left?
Amy: No, I couldn't find them, so I'm freeflapping.
Amy: No, I couldn't find them, so I'm freeflapping.
Freeflap
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."
Sally - "Oh, I'm freeflapping."