Now buddy, how are we supposed to help you if you won't even share the problem with us? I know a guy who's been called a certain name for six CONSECUTIVE years just because his tongue slipped ONE TIME. Teenagers will find the slightest reason to bully others because it's really funny. If you'd actually attack them it'd just make everything worse (for you).
Have you tried diplomacy? Ask them why they call you that. Unless you have an annoying voice, of course, as it just makes them want to laugh and tell you to stfu.
I've been told that I'm not that good at giving advice.
But seriously, reporting them to the administration office will just make it so nothing will happen with them and you will just get your ass kicked, probably till you move away or kill yourself. I remember reading about a similar case where a guy was constantly harrassed for two years, reported the offense to the main boss guy(gal) of the school, nothing happened to the bullies and the kid eventually tried to off himself, giving himself severe brain damage.
There might be a few ways to deal with this, every single one depending on your personality and body shape. If you're tubby no one will take any of your srsbsns attempts seriously, nor will anyone do it when you look like a twig. Looking at it from another side, bullies don't really pick on normal kids so I really don't know what I'm trying to say.
You will just have to face that whatever the kids are calling you will stick to you UNTIL YOU FINISH SCHOOL AND YOU CAN DO ABSOLUTELY JACK SHIT ABOUT IT. Be a man and stop the boo-hoo.
Now some experience talk: There's a guy in my class who no one considers a true friend, he's chubby, short and has a really abrasive personality. He really thinks he's hilarious and doesn't get why everyone picks on him, not to mention that he likes to stalk girls. He has suffered for about seven years and will do so for three more. My point? Again, BE A MAN, even if only on the outside. Feel free to weep like a baby when you're alone.
If any of my words actually insulted anyone then it must be true, otherwise you wouldn't care. This is an internet community and I doubt people care how you look like when it's fun roleplaying with you.