少年不蓅氓发育不正常
[shăo nián bù liú máng fā yù bù zhèng cháng]
'If Young Men Don’t Misbehave, They Are Not Developing Normally' humorously suggests that behaving naughtily or rebelliously during adolescence is normal and expected. This phrase uses unconventional wording to imply youthful mischief as part of growing up.