What is the j word for making fun of a person in a rude way?

The "j Word" you're referring to is likely "joke," but in the context of making fun of someone in a rude way, it may also imply "jabbing" or "jibe." These terms refer to making sharp or mocking remarks at someone’s expense. Such behavior can be hurtful and is often viewed as a form of bullying. It's important to be mindful of how humor can affect others.