bad-mouth 说坏话（俚语）

英文释义

(transitive verb, SLANG) To slander; to make harmful, usually untrue remarks about a person.

例句

My unhappy old neighbor always bad-mouths her unfortunate husband because he doesn't earn enough money to please her.

我的不快乐的老邻居总是说她可怜丈夫的坏话，因为他挣不到足够让她满意的钱。