a hot potato
一个棘手的问题或情况，难以处理或回避
口语·形容敏感或棘手的问题
英文释义
a controversial or sensitive issue that is difficult to handle or solve
例句
The tax reform is a hot potato that politicians avoid discussing.
典故来源
源自烫手山芋，拿不住又放不下，比喻棘手且易引发争议的问题。