noun
Refers to a man who is stylish, well-dressed, and often handsome, sometimes with a slightly showy or affected air.
彼はいつもスーツを着こなす伊達男だ。
He's always a dandy who wears his suits well.
noun
A man who is gallant, courteous, and protective, especially toward women; somewhat old-fashioned or literary.
彼は女性に優しい、まさに伊達男だ。
He is kind to women, a true chivalrous man.
Derived from 伊達 (date), referring to the flamboyant style associated with the Date clan of Sendai, combined with 男 (otoko, 'man').