I will be beaten tomorrow. How can I defend myself?

You'd better not steal other people's food. Smile with others. If you are classmates, why do you want to fight? Anything can be mediated, just say that I grow vegetables and you can pull them tomorrow. That is, the food I will send you tomorrow. Who told you to curse? So if it doesn't work, You can call the police. You can also give an early warning. Just say someone is going to hit me. And tell me why. It would be better this way. Of course, we must improvise.