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置事情,可以翻译为abandon oneself to emotion,give way to ones feelings等。

例句:

不要感情用事

Dont let yourself be swayed by your own sentiments.

做买卖不可以感情用事。

There is no place for sentiment in business.