4.to drop sb/sth like a hot potato<非正式>把…像烫手山芋似的甩开；尽快与…断绝关系
If you're dating a guy who immediately wants to get seriously involved, drop him like a hot potato.如果约会对象想马上就开始认真交往的话, 那就尽快甩了他。
If his campaign fails, he will drop it like a hot potato.如果在竞选中失败的话, 他会马上退出。
5.hot potato<非正式>(contentious subject)棘手的问题；烫手山芋；难题
a political hot potato政治上的棘手问题
Another hot potato is stem cells.另一个难题是干细胞。