小三你当回人行么
[xiăo sān nĭ dāng huí rén xíng me]
This nickname carries a confrontational and sarcastic tone. The term "小三" (xiǎo sān) refers to a 'third party' in a romantic or marital relationship, implying someone having an affair with a married person. The whole phrase can be translated as 'Hey mistress, will you behave yourself for once?', expressing dissatisfaction or disdain.