Webster's Revised Unabridged Dictionary · 1913

Flapper

Flapper , noun

1.
One who, or that which, flaps.
2.
See Flipper.
The flapper of a porpoise. — Buckley
3.
A flat object used to make a flapping noise by striking another object. — RHUD
4.
A flat and broad object hanging from a larger object, either flexible like rubber or hinged to allow a swinging motion; a flap.
5.
A young woman who dresses in a modern, stylish manner and behaves unconventionally in social situations; -- a term used especially to refer to young women during the 1920's and their peculiar style of dress.
Collocations (1)
Flapper skate (Zoology) , a European skate (Raia intermedia).