Right now, no one. At least, not the systematic, repetitive sort of thing that wears you down in school. I don't really count things like random people yelling "r*t*rd" at me on the sidewalk, because my reaction to that tends to be to immediately categorize them as people whose opinions are not worth caring about. (Yeah, it's happened. I don't know why I seem that odd.)
It's not the random insults from people I'll never meet again that bug me; it's the way people you can't escape from make it a hobby to annoy, hurt, terrorize, and generally be a dick to you in a repetitive fashion. That is not nearly so easy to shrug off. You can't just walk away when you go to school with the people, because you're bound to meet them again and then they'll have "wuss" to insult you with, too.
Trust me, guys--if you're in high school now, it really does get easier. While adults can and do bully each other, they are socially obligated to be more subtle about it, and that makes it easier to ignore. And you can even press assault charges if it gets physical.