noun
an arbitrary, impulsive, and often illogical notion or change of mind
given to sudden caprices and random fancies
Synonyms: bee, boutade, conceit, crank, crotchet, fancy, freak, humor, maggot, megrim, notion, vagary, whigmaleerie, whim, whimsy
Related Word: mood, temper, vein; contrariety, inconsistency, perversity; characteristic, foible, habit, mannerism, peculiarity, trait, trick