“泼脏水”，字面意思“splash dirty water”，泛指对人造谣污蔑，刻意中伤（slander），常用表达如“朝某人泼脏水”，与英文习语“hurl/throw/sling mud at somebody”意思相近，表示“to say insulting or unfair things about someone, especially to try to damage their reputation”。
- 为了诋毁她的名誉，有人不停地往她身上泼脏水。
Someone has kept throwing mud at her in order to vilify her reputation. - 他是那种当面胁肩谄笑，背地里泼脏水的人。
He was the kind of person who would flatter you to your face, and then slander you behind your back.
