名詞 flapper:

1. a young woman in the 1920s who flaunted her unconventional conduct and dress

flap.per

n.（名詞）
A broad, flexible part, such as a flipper.
拍擊物：象鴨腳板似的寬而有彈性的物體
A young woman, especially one in the 920`s who showed disdain for conventional dress and behavior.
輕佻女郎：尤指9世紀(jì)20年代對(duì)傳統(tǒng)的衣著和行為表示不屑的少婦

來源：
Sense 2 British Slang [very young female prostitute, flapper]
釋義2 英語俚語 [年輕妓女，放蕩的少婦]
possibly from flapper [fledgling partridge or duck] from flap
可能源自 flapper [初生羽毛的松雞或鴨] 源自 flap
or from dialectal flap [loose or flighty girl]
或源自 方言 flap [放蕩而輕浮的女孩]