36 Moby Thesaurus words for "passing fancy": boutade, brainstorm, calf love, capriccio, caprice, case, conceit, crank, craze, crazy idea, crotchet, crush, fad, fancy, fantastic notion, fantasy, flimflam, fool notion, freak, freakish inspiration, harebrained idea, humor, infatuation, kink, maggot, mash, megrim, notion, pash, puppy love, quirk, toy, vagary, whim, whim-wham, whimsy