Synonyms of old hat in English:

old hat


See US English definition of old hat

See UK English definition of old hat

phrase

1‘something that is exceedingly popular today is usually old hat by tomorrow’

SYNONYMS
out of date, outdated, dated, old-fashioned, out, out of fashion, outmoded, unfashionable, last year's, frumpish, frumpy, out of style, outworn, old, old-time, old-world, behind the times, archaic, obsolescent, obsolete, ancient, antiquated, superannuated, defunct
medieval, prehistoric, antediluvian, old-fogeyish, old-fangled, conservative, backward-looking, quaint, anachronistic, crusted, feudal, fusty, moth-eaten, olde worlde
passé, démodé, vieux jeu
informal square, not with it, out of the ark, creaky, clunky, mouldy
Northern English informal antwacky
North American informal horse-and-buggy, rinky-dink, mossy
archaic square-toed
ANTONYMS

modern, up to date, fashionable