go one's own way
go or act as one wants to独自行动；一意孤行
It's no use arguing with him，for he will go his own way instead of changing his mind．和他争论没用，因为他将一意孤行，不会改变主意。
None of this was discussed or communicated to me．He went his own way．此事根本没有讨论过，也没有通知过我，他独断专行。