Connection to “Losing Face” and “Green Hats”: This term is deeply connected to the concept of
戴绿帽子 (dài lǜ màozi), “to wear a green hat,” which is the definitive Chinese expression for being cuckolded. Being cheated on causes a man to “lose face” (丢面子 - diū miànzi). 隔壁老王 is the one who *gives* you the green hat. Joking about him is a way for men to preemptively laugh at this social fear, turning a potential source of great shame into a communal joke.