小三您走好千万别摔倒
[xiăo sān nín zŏu hăo qiān wàn bié shuāi dăo]
This nickname sarcastically mocks the situation of a 'third party' or someone who intrudes into an existing relationship. The term expresses irony towards such people, implying they should take care while pursuing their path. In a way, it highlights the societal disapproval toward infidelity.