talk shit

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释义
说坏话
to say unkind things.

例句
Fiona:I know what you're doing.Bad-mouthing Steve.He'd never talk shit about you, ever.（Shameless）
菲奥娜：我知道你在干嘛？恶语中伤斯蒂夫他可从来没说过你不好。（无耻之徒）