傻瓜你不是我新郎笨蛋你不是我新娘
[shă guā nĭ bù shì wŏ xīn láng bèn dàn nĭ bù shì wŏ xīn niáng]
The nickname implies the playful teasing or lament of a couple mismatch, using humor to reflect someone who isn't the right match, almost like singing with irony and sadness about someone unworthy being paired with oneself. It is often used lightheartedly or in the context of expressing romantic disappointment or confusion.