A person who is scared or the flaps of a fanny
I swear Marcus is such a fanny flap
Or
Her fanny flaps looked like a subway ham baguette
A term that can be used as "dick" or "cunt"
Cunt
Dickhead
"Did you wash my socks you fanny flap?"
The same meaning as Willy Waving but for woman. DM
An expression of showing off.
"Rebecca is fanny flapping about £5k sales this month."