You are going to find that in life you will be called worse names by much better people. It happens. It sucks. But it happens. It is not just stuttering that creates this phenomenon. Take however long it takes to stick up for yourself. Usually, if fluent, I would say takes a big man to talk crap on the handicap. This applies to anyone with a disability. When it comes to me as a stutterer, I used to have several nemesis in school. Sometimes it was bullying in class or on the playground. I don't know what your stature is, but if athletic, play a little more physical with these individuals. If you are in class, and if you trust a teacher, have them roast the student in class for what they say. It does not take much to put these types of people in their place. If you are with your friends, have them shun the person. Essentially, you make the bully the outcast and not the center of attention. You will find that most people who talk like this have bigger issues and problems than you have stuttering. If you want to be a jerk like them, you can exploit their weakness. But in all honesty, the best thing you can do is to ignore it for as long as you can (see my other comment in this thread for when you lose yourself). I once had a kid when I was in high school that I refused to talk to. He called me all sorts of names and mock me. I ignored him and would walk right through him as though he was not there. He would antagonize the absolute shit right out of me. One day he did that when the principal was walking the school grounds at lunch. I knew him well enough to say hello every day, make small talk, etc. He saw what happened and asks me why I was so rude to the other student. I explain what had been going on. The principal goes to walk the campus during lunch and takes him to the office for what I later learned was a very long lecture, all on my behalf. I have found that most people, especially in today's world , but even when I was growing up, will have your back. You know the cliche strength in numbers? Surround yourself with people who have your back.