old hat

adjective

1. old-fashioned; dated.
2. trite from having long been used or known.

adjective

1. (postpositive) old-fashioned or trite

adj.“out of date,” first recorded 1911. As a noun phrase, however, it had different sense previously. The “Classical Dictionary of the Vulgar Tongue” (1796) defines it as, “a woman’s privities, because frequently felt.” Obsolete, old-fashioned: “Get with it, Murray; your methods are strictly old hat.”