fight your corner/fight somebody's cornerBritish EnglishBrE to try very hard to defend yourself in a discussion or argument, or to do this for someone else 〔讨论、争辩时〕为自己/某人据理力争 My line manager supports me, and says she’s willing to fight my corner. 我的部门经理支持我，说她愿意为我据理力争。
→ fight your corner/fight somebody’s corner at corner1(4)