According to a query to Baidu Encyclopedia, brother is no longer the brother who used to drink and sing. The lyrics are from the song "Brother is no longer the brother of the year" written by Zhang Lingru, composed by Chen Wei and sung by Uncle Qiu Pants. It means that brother is no longer the young, carefree person who could enjoy life to the fullest, and has now matured and no longer enjoys drinking and singing as much as he used to. Lyrics excerpt: Brother is no longer, the brother of that year. No longer with the spring breeze, singing to the wine. I don't want to go to the jungle, I become a legend.