flapper

Webster's Dictionary (1913)

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.

Flapper skate Zoology, a European skate (Raia intermedia).

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: GCIDE editors