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.
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.