noun
Refers to idle talk, pointless matters, or trivial things not worth serious attention. Often used in the phrase よしなし事を言う (to talk nonsense).
彼はいつもよしなし事ばかり言っている。
He is always talking nonsense.
会議ではよしなし事に時間を費やしてしまった。
We wasted time on trivial matters in the meeting.
From よしなし (meaningless, trivial) + 事 (thing). The exact historical derivation of よしなし is uncertain, but it is a classical Japanese adjective meaning 'without reason' or 'pointless'.