Word Study
old hat
THESAURUS
old hat
antique, archaic, back-number, banal, behind the times, bewhiskered, bromidic, common, commonplace, corny, cut-and-dried, dated, demode, fade, familiar, fusty, hackney, hackneyed, has-been, moth-eaten, musty, old-fashioned, old-time, old-timey, oldfangled, out of fashion, out of season, out-of-date, outdated, outmoded, platitudinous, set, square, stale, stereotyped, stock, styleless, threadbare, timeworn, trite, truistic, unfashionable, unoriginal, warmed-over, well-known, well-worn, worn, worn thinFor further exploring for "old hat" in Webster Dictionary Online