哥称霸幼稚园
[gē chēng bà yòu zhì yuán]
'I Dominate the Kindergarten.' This implies that despite appearing mature (like 'big brother,' which '哥' signifies), the person behaves playfully and enjoys being mischievous at times or finds joy in less serious environments like kindergarten. It’s somewhat ironic since typically, kindergartens cater to small children and not older individuals.