cliché

twice-told

bromidic, platitudinal, platitudinous

canned, cardboard, conventional, cookie-cutter, derivative, imitative, ready-made, tried-and-true, unimaginative, uninspired, unoriginal

normal, ordinary, rote, routine, standard, stock, typical, usual

arid, barren, boring, colorless, drab, dreary, drudging, dry, dull, dusty, flat, heavy, ho-hum, humdrum, jading, jejune, leaden, mind-numbing, monotonous, numbing, old, pedantic, pedestrian, ponderous, prosaic, stodgy, stuffy, tame, tedious, tiresome, tiring, undramatic, uninteresting, vapid, wearisome, weary, wearying

old-fashioned, old hat

conventional wisdom, party line, routine

inanity

generality, generalization, simplification

adage, proverb, saw, saying

old wives' tale, stereotype