What should my classmates do if they take me as a joke to make female classmates laugh?

Typical harm to others is not good for yourself. . . . . .

There is little chance of attracting it. Even if it succeeds, it is you, not him, who attracts the attention of the estimated woman.

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The more you talk to him about this, the happier he will dance. . . I suggest you ignore it (╯ ▽ ╰) ╭.

If you feel powerless to fight back, these two methods,

Either transfer others through his topic, or transfer to other topics (in fact, you need flexible reaction and association ability). . .

Or you can confront him directly. If he calls you stupid, you call him stupid, and he calls you stupid.

Just say that he is not even as good as 2 (if he has a bad temper, he will probably fight). . . . . .

Everyone has shortcomings, so it's no big deal to be laughed at. . It's amazing that anyone can be found. .

I can do nothing about it.

Try to foster strengths and avoid weaknesses, so that he is embarrassed to use you as an introduction. .