What do you call a guy who is the best fighter in the school. Those kinds of people often bully others and other students are afraid of facing him. Is there any slang for it?
Thanks.
I would not necessarily equate the person who is the best fighter in the school with being a bully who people are afraid of. The best fighter in school might be a perfectly nice young man who goes on to become a world-class boxer.
The kind of person at a school who threatens to beat other students up ("to beat up" is the phrasal verb to look up in a dictionary here) is usually just known as a bully. There are other ways of bullying students but being violent is one of them.
Personally, my word for such a person is "coward" but that is not the kind of term generally used within schools (or workplaces) for a bully.