It’s a homophone for selling rotten food.

Extension:

"Fu" means hopeless in Japanese, and fujoshi girls usually like gay anime and like scenes of being attacked by fantasy evil tentacle monsters. The way women address each other. The full name is "fujoshi", which mainly refers to women who like BL, which is the fantasy of male-male love (i.e. gay men). Since "fu" literally means great ideas, if you are not familiar with the person you are talking to, most people will use the word "fellow woman" to describe it in a more neutral way so that it does not sound harsh.

Fu Nan: I agree with Fu Nan. It’s boys who like the beauty culture, but they are not gay. They mingled in the Danmei circle, but they were not corrupted.

But this meaning is just an extended meaning of "fu", and "fu" also has other complex meanings in Japanese. In other words, in some cases, the "fujoshi" and "fujoshi" mentioned in Japanese descriptions may not mean indulging in same-sex love. To avoid misunderstandings, please distinguish carefully based on the context.