See banal in Webster's New World Roget's A-Z Thesaurus II
Without freshness or appeal because of overuse:
bromidic, clichéd, commonplace, corny, hackneyed, musty, overused, overworked, platitudinal, platitudinous, shopworn, stale, stereotyped, stereotypic, stereotypical, threadbare, timeworn, tired, trite, warmed-over, well-worn, worn-out. See excite, usualLearn more about banal