(n.) A kind of dandy; especially, one characterized by an ultrafashionable style of dress and other affectations.

Beau Brummel beau blade blood boulevardier buck chap clotheshorse coxcomb dandy exquisite fashion plate fellow fine gentleman fop fribble gallant guy jack-a-dandy jackanapes lady-killer lounge lizard macaroni man man-about-town masher popinjay puppy spark sport swell