A flapper was a trendy young woman in the 1920s.
Flapper may also refer to:
Flapper (company), a Brazilian transportation network company for aviation The Flapper, a 1920 American film directed by Alan Crosland Flapper valve, a part of some flush toilet mechanisms Flappers (TV series), a Canadian sitcom produced by the CBC in the late 1970s Flapper, a rock-climbing-related avulsion injury Flapper!, a play by Tim Kelly and Bill Francoeur Fire flapper, a fire suppression device QP:flapper, a two-member illustrator unit consisting of Japanese artists Tometa Ohara and Koharu Sakura