Make up a joke about missing class.

Let's not argue. Swearing people are usually of low quality. That boy will laugh at you. That's pot calling the kettle black. If he is really good, he has the ability not to study in make-up classes. So he's no better. Just ignore such boring people. If he is really laughing at you, then he is an unreasonable person. This kind of thing is solved by teachers and parents.