FLAPPER
flapper
(noun) a young woman in the 1920s who flaunted her unconventional conduct and dress
Source: WordNet® 3.1
Etymology 1
Noun
flapper (plural flappers)
(colloquial, now chiefly historical) A young woman, especially when unconventional or without decorum; now particularly associated with the 1920s. [from 19th c.]
Etymology 2
Noun
flapper (plural flappers)
Something that flaps.
(hunting) A young wild duck.
A flipper; a limb of a turtle, which functions as a flipper or paddle when swimming.
• Buckley
(plumbing) A flapper valve.
• Popular Mechanics Complete Home How-to (page 356)
(rock climbing) Any injury that results in a loose flap of skin on the fingers, making gripping difficult.
Source: Wiktionary
Flap"per, n.
1. One who, or that which, flaps.
2. See Flipper. "The flapper of a porpoise." Buckley. Flapper skate
(Zoöl.), a European skate (Raia intermedia).
Source: Webster’s Unabridged Dictionary 1913 Edition