今朝有酒今朝醉管他明日喝凉水
[jīn cháo yŏu jiŭ jīn cháo zuì guăn tā míng rì hē liáng shuĭ]
Derived from a classical Chinese poetic line, this phrase means living in the moment and indulging oneself now without regard for tomorrow, even if hardship follows. It reflects a carefree attitude.