Green’s Dictionary of Slang

Fred Astaire adj.

[his style; for full ety. see prev.]

(US campus) stylish.

(con. 1940s) A. Coppel A Little Time For Laughter 294: You remember when we used to say things were Fred Astaire? Like smoking Virginia Rounds and wearing neckties instead of belts? And brown-and-white shoes [HDAS].