男生不卖萌发育不正常女生不流氓发育不正常
[nán shēng bù mài méng fā yù bù zhèng cháng nǚ shēng bù liú máng fā yù bù zhèng cháng]
This nickname is a humorous phrase playing on societal expectations and personality traits. It implies that boys who are not cute and girls who do not behave somewhat mischievously during development might miss out on some part of their growth experience. This expresses a view against overly strict or conventional social norms on youth behavior.