frivolity
(noun)
noun
1. the trait of being frivolous; not serious or sensible
Similar word(s): frivolousness
Definition categories: attribute, trait
2. something of little value or significance
Similar word(s): bagatelle, fluff, frippery
Definition categories: man–made, trifle, trivia, triviality
3. acting like a clown or buffoon
Similar word(s): buffoonery, clowning, harlequinade, japery, prank
Definition categories: act, craziness, folly, foolery, indulgence, lunacy, tomfoolery