小三你是狗还是婊
[xiăo sān nĭ shì gŏu hái shì biăo]
This nickname is highly derogatory and insulting. 'Xiao san' refers to a 'homewrecker' or someone who is having an affair with a married person, and it questions whether such a person is more dog-like (unfaithful) or more of a promiscuous person. It carries strong negative connotations.