“不三不四”，汉语成语，意思是不像这也不像那（neither one thing nor the other）。即不像样子，不伦不类。形容不正派或不像样子。可以翻译为“dubious¹/shady/unsavoury(characters)”。

 

例句：

 

她的朋友尽是些不三不四的人。

Her friends are all pretty unsavoury characters.

 

有些不三不四的人在酒吧周围游荡。

There were some really dubious characters hanging around the bar.

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