“潑臟水”，字面意思“splash dirty water”，泛指對人造謠污蔑，刻意中傷（slander），常用表達如“朝某人潑臟水”，與英文習語“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”。

例句：

為了詆毀她的名譽，有人不停地往她身上潑臟水。
Someone has kept throwing mud at her in order to vilify her reputation.

他是那種當面脅肩諂笑，背地里潑臟水的人。
He was the kind of person who would flatter you to your face, and then slander you behind your back.

Editor: Jade