(ˈ)tämˈfül(ə)rē, -ri noun
Etymology: tomfool (I) + -ery
1. : foolish or ridiculous trifling : nonsensical behavior or speech : nonsense
indulge in tomfoolery
2. : an act, practice, speech, or thing that is nonsensical, foolish, or useless
racehorses and football and tomfooleries of that sort — Sheila Kaye-Smith
3. : silly or trumpery trifles or ornaments
among a lot of elegant tomfoolery that makes it clear how the establishment got its name — New Yorker