old hat

antique, ancient, very old

Uncle Dog is a band that released an album and single in 1972. Members were: Carol Grimes (voc), Phillip Crooks (Guitar), Sam Mitchell (Guitar), John Porter (Guitar, Bass), David Skinner (key, voc) (ex-Twice As Much), Terry Stannard (dr).Guest musicians on the L.P. were John Pearson (drums) and John 'Rabbit' Bundrick (piano). Most of the songs were penned by Dave Skinner, although there are a few covers, including Bob Dylan's "I'll Be Your Baby Tonight" (from John Wesley Harding) and Sam Phillips/Herman Parker's "Mystery Train".  John Porter is a producer nowadays and produced The Smiths and John Lee Hooker's comeback album in 1989.
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Adjective
1. repeated too often; overfamiliar through overuse; "bromidic sermons"; "his remarks were trite and commonplace"; "hackneyed phrases"; "a stock answer"; "repeating threadbare jokes"; "parroting some timeworn axiom"; "the trite metaphor `hard as nails'"
(synonym) banal, commonplace, hackneyed, shopworn, stock(a), threadbare, timeworn, tired, trite, well-worn
(similar) unoriginal
2. out of fashion; "a suit of rather antique appearance"; "demode (or outmoded) attire"; "outmoded ideas"
(synonym) antique, demode, ex, old-fashioned, old-hat(p), outmoded, passe, passee
(similar) unfashionable, unstylish

an old idea or fashion, passé Sunday picnics are old hat. They're not popular now.

Synonyms and related words:
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hackneyed, has-been, moth-eaten, musty, old-fashioned, old-time, old-timey, oldfangled, out of fashion, out of season, out-of-date, outdated, outmoded, platitudinous, set, square, stale, stereotyped, stock, styleless, threadbare, timeworn, trite, truistic, unfashionable, unoriginal, warmed-over,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 thin