感情用事,漢語成語,意思是憑個人的愛憎或一時的感情沖動處置事情,可以翻譯為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.

做買賣不可以感情用事。

There is no place for sentiment in business.