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.
See also: rogue adjective