Kick him in the crotch "by accident."

Time to break out the laxatives and cook up something "special "

Sounds like u need to find a way to get back at him that you can make look like an accident. On a side note your mom has issues if she thinks he doesn't know any better by the age of 13

Punch him back

Tell him to try it again and accidentally kick him really hard as your " instant reaction"

My brother would do those things, and usually it resulted in me bringing down humiliation on him. After his breaking a lamp and blaming it on me, which was followed by a spanking for me, I suspended him by his feet from the top bar of the swing set. Our house was the first in the neighborhood and our back yard could be seen from the road. He hung there while all of the neighbors came home from work. :)

your mom is a pampering idiot who should know better!

kick him as hard in the nuts if he comes near and tell him it doubles until he grows up at say 50. then when your parents say something you dudnt know kicking him hardvwould hurt

And for my next trick, I need your bank account SSN wallet credit cards and your dignity

Hope your parents won't mind if you give him some fruit PUNCH. (Cover your hand in fruit juice and punch him in the face)