Well, I'm usually peaceful, but when my parents keep bugging me about my haircut, for example, I just start shouting at them angrily to leave me alone. That keeps them away for some time.
In high school when my friends decided it was fun to lift me because I'm light (kind of a weird game), and I asked them not to, and it didn't help, I got a little violent for a few seconds, till they stopped, just to release myself. They were shocked, but we were on friendly terms again five minutes later.
Just give him an angry expression and yell at him once or twice. Not to offensive, but till he doesn't want to try it anymore.