“感情用事”，汉语成语，意思是凭个人的爱憎或一时的感情冲动处理事情，可以翻译为“abandon oneself to emotion，give way to one's feelings”等。

例句：

不要感情用事

Don't let yourself be swayed by your own sentiments.

做生意不能感情用事。

There is no place for sentiment in business.