hot potato 烫手山芋（喻指棘手的问题）
They will do anything they can to drop her like a hot potato.
in hot water 遇到麻烦
I needed to be at the airport early, and as I got into a taxi I was worried that I might be in hot water if traffic congestion was worse than normal.
hot and bothered 烦躁不安
Officials at the Defence Ministry are getting all hot and bothered about secrets getting out.
full of hot air 夸夸其谈
His utterances were full of hot air.
blow hot and cold 反复无常，摇摆不定
Some people can make up their minds right away, but others blow hot and cold.
have the hots for 迷恋某人
George seems to have the hots for Mary.
hot on the heels 紧随其后
Hot on the heels of Baidu’s new mobile OS launch, reports are circulating that the Chinese search giant is partnering with Dell to build tablets and mobile phones.
in the hot seat 挑大梁；困境，尴尬境地
He is to remain in the hot seat as chief executive.
The CEO found himself in the hot seat after another bad quarter.