人不风流往年少人不犯二枉骚年
[rén bù fēng liú wăng nián shăo rén bù fàn èr wăng sāo nián]
This nickname implies a person who wants to enjoy their youth and not regret not having been carefree and mischievous when young. The phrase can be roughly translated as 'If one does not behave freely (and a bit recklessly) in their youth, they may later regret the lost time'.