flapper
(colloquial, historical) A young girl usually between the ages of 15 and 18, especially one not "out" socially.
(colloquial, chiefly historical) A young woman, especially when unconventional or without decorum or displaying daring freedom or boldness; now particularly associated with the Jazz Age of the 1920s.
"Now," said the young man cheerfully to Ardita, who had witnessed this last scene in withering silence, "if you will swear on your honor as a flapper—which probably isn't worth much—that you'll keep that spoiled little mouth of yours tight shut for forty-eight hours, you can row yourself ashore in our rowboat."
One who or that which flaps.
(hunting) A young game bird just able to fly, particularly a wild duck.
A flipper; a limb of a turtle, which functions as a flipper or paddle when swimming.
(plumbing) A flapper valve.
(slang) The hand.
(rock climbing) Any injury that results in a loose flap of skin on the fingers, making gripping difficult.