Say a person is "2B", what does this 2B mean?

"2" is used to insult each other and call them stupid in the vast areas of northeast China. For example, you are a real person. And "b" is homophonic with a word in a dirty word, so "2B" is a very insulting word. Some people call it "ZB+SB=2B". At the same time, 2B can also be used as the abbreviation of this kind of people. It may be harmless for friends to mock each other with "2B" as a joke on the Internet. For example, Zhao Jinlong, a network celebrity, is often named by friends. People who behave in a different way or are too unreasonable are often called here. Familiar friends can talk casually, and strangers should be kind.