if you maybe have a big bro or uncle tell them or your perents

beat them with a huge iron pole then laugh at them as they cry and tell them your father was bruce lee

All these suggestions (like punching them) aren't gonna help you in the long term...
Think about the future. I recommend doing the following things:
Tell your principle, if you get one day of peace and it starts over again, tell him again, if you get another day of peace and it starts again, tell the principle once again. By doing this you are effectively training them (like dogs)... they do a naughty thing, they get told off.
Another thing you could do, is make a complaint to your local council (if the principle obviously isn't doing what he should be doing correctly, like discipling them in the right way) Note though: that should be last resort, the last thing you want is the principle disliking you and whenever you complain action is really done.

Another action which I recommend is calling childline. Although embarrassing it may seem at the present time, in the long run it WILL help you out. Childline will sort out your problems easily, and stress free. They almost certainly will not only discipline the bullies, but your principle too (especially because, to me it sounds like he hasn't been doing his job properly)

Finally, a last ditch resort would be to move schools.
I don't really think you should though. Because if you see them regularly out of school, then thats really gonna be scoring an own goal on your behalf. (Public humiliation.. etc etc)

well shit. if you show some whats good once im sure they'll stop messing with you . screw your parents and just punch the kid in the jaw. dont worry about getting ISS or suspended because 7th grade isnt that important

speed > power

experience

when they call you the names just agree with them, eventually they will get bored and hopefully move on to someone else!

the minute you stand up for your self they will stop

I have an idea take a nice mini bat to school and then **** them all up with that

i do GFX and im beast at my school im supper popular from doing ot

helloponk wrote i really dont know what to say im 6"3 and have a 3 pack in 7th grade too so kids dont mess with me and when they do i kick their a** all i have to say is to tell your parents again and try getting them suspended.

"3 pack" are you talking about abs?

Also I had a hard time with bullies for 4 long years, suicide became an option. Then I just did a lot of weight lifting (I mean a lot) and I took my anger out on other things like, punching bags. It helped me a lot and didn't give them the satisfaction to see me in pain or something like that. You will get through it eventually trust me.

Clear.
Buddy.

Ignore Em, They're Just Jelly.