Allah says in Quran "O people who believe, your males never make of other males and your females never make fun of other females, may be they are better than them." And you know the people of Makah used to make fun of our beloved prophet Muhammad (S.A.W) but he never reacted. He tolerated their behaviour. Our prophet (S.A.W) is role model for us. If anybody makes fun of us, we should tolerate and wait for the time when he abandons this bad habit. If he vexes you then tell your teacher so that he may be stopped.