noun
violent conduct; misconduct; debauchery
Refers to disorderly, immoral, or violent behavior, often implying a lack of self-control. Can be used for personal misconduct or broader social disorder.
彼は乱行の末に逮捕された。
He was arrested after his violent conduct.
その政治家の乱行が新聞で報じられた。
The politician's misconduct was reported in the newspaper.
Compound of 乱 (disorder, riot) and 行 (conduct, action). The exact historical derivation is uncertain, but the kanji combination directly conveys 'disorderly conduct'.