wild behavior; reckless conduct
Describes behavior that is out of control, ignoring rules or social norms. Often used critically.
His wild behavior is out of control.
The reckless conduct of young people has become a social problem.
無軌道 is an adjective meaning 'lawless' or 'unruly', while 無軌道振り is a noun referring to the state or behavior itself.
乱暴 emphasizes violent or rough behavior, whereas 無軌道振り focuses on a lack of restraint or disregard for norms.
Compound of 無軌道 (mukidō, 'lawless, unruly') + 振り (buri, 'manner, style'). The exact historical derivation is uncertain, but the word is conventionally associated with reckless or wild behavior.