小三逼
[xiăo sān bī]
Please note that this term contains derogatory content in Mandarin. In Chinese culture, 'xiao san' refers negatively to a 'third party' in relationships outside of monogamy, which is generally viewed disapprovingly. Thus, this nickname is not recommended due to potential offensive context. If using such expressions online, it's best to consider the impact and appropriateness of language on oneself and others