rogue
adjective [ before noun ] uk/rəʊɡ/ us/roʊɡ/
异常的；行为失常的；常制造麻烦的
behaving in ways that are not expected or not normal, often in a way that causes damage
a rogue state 流氓国家
rogue cells 无赖细胞
biology specialized（野兽）离群且危险的
A rogue animal is a dangerous wild animal that lives apart from the rest of its group.
go rogue informal离群（去做危险的事）
to start behaving in a way that is not normal or expected, especially by leaving your group and doing something dangerous
A Special Forces unit had gone rogue and was trying to free the hostage. 特种部队的一支小分队擅自离开，试图去解救人质。
Her latest novel is about an undercover government agent who appears to have gone rogue.
But this is not your standard 'cop goes rogue' movie.
The party leader had accused her of going rogue.
One of the circus elephants went rogue and trampled several large props.
rogue
noun [ C ] uk/rəʊɡ/ us/roʊɡ/
old-fashioned humorous捣蛋鬼，调皮鬼
a person who behaves badly but who you still like
"Come here, you little rogue!" chuckled my uncle. “到这儿来，你这个小坏蛋！”叔叔咯咯地笑着说。
The women all think he's a lovable old rogue. 在所有女人眼里，他是个可爱的老活宝。
old-fashioned无赖，流氓，恶棍
a dishonest or bad man