hot potato
棘手的问题或困难，很难应付或处理的情况
口语·讨论敏感或争议话题
英文释义
something that is difficult or dangerous to handle; a controversial or sensitive issue
例句
The tax reform is a political hot potato that no one wants to touch.
典故来源
刚煮熟的土豆烫手难握，比喻棘手或敏感的问题。