"Flappers were seen as brash for wearing excessive makeup, drinking, treating sex in a casual manner, smoking, driving automobiles and otherwise flouting social and sexual norms".
In the 1920s, flapper was a term applied to a "new breed" of young Western women who wore short skirts, bobbed their hair, listened to jazz, and flaunted their disdain for what was then considered acceptable behavior. If you were to look up 'Flapper' in the 2010s, pretty sure you would find this:
Thanks for dinner, Flaps (aka Classy Casey). No, jokes, she is classy & sexy & kind. Lub chu. X.
Conversation between me & my little sis after a shopping trip one day:
Casey: I just wish this dress was a bit longer...
Me: It's a top.