Eating for free means eating other people's food for free, eating without working, eating without paying, that is, doing nothing and living by blackmail. Explain that eating other people's food for free means just eating without working and eating without paying, which also means doing nothing and living by blackmail. The source is Ming Lingmengchu's "Surprise at the First Moment" volume 18: The situation is listed here, and I don't eat for nothing without breaking money.