戴綠帽子

1. • to have been cheated on by one's partner (formerly meant "to be a cuckold", i.e. applied to men only)

Character by character

• 戴(dài)surname Dai
• 綠(lǜ)green
• 帽(mào)hat
• 子(zi)noun suffix, as in 椅子 yǐzi "chair"