臭皮囊

臭皮囊 is a Buddhist coinage: literally "stinking leather sack" — the body as a temporary, decaying container for the spirit. It appears in classical novels like 《红楼梦》 (Dream of the Red Chamber) and 《西游记》 (Journey to the West) and is still used today, often jokingly, to brush off concerns about appearance or physical comfort.

Marked, literary / philosophical register. Modern usage tends to be self-deprecating or ironic — 'I just have to feed this old stinking bag of flesh'.