1. a young woman in the 1920s who wore short skirts, had short hair, and behaved in ways that were considered unconventional
Usage: historical
2. something that flaps, especially a broad flat part that moves back and forth

Examples

• The flapper danced the Charleston at the jazz club.
• She dressed like a 1920s flapper for the costume party.
• Flappers challenged traditional ideas about how women should behave.
• The bird’s wing flapper helped it stay balanced.
• The rubber flapper on the toilet tank wasn’t sealing properly.
• He adjusted the flapper valve to stop the water from running.