noun
wild behavior; reckless conduct
Describes behavior that is out of control, ignoring rules or social norms. Often used critically.
彼の無軌道振りには手が付けられない。
His wild behavior is out of control.
若者の無軌道振りが社会問題になっている。
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.