A quick Raikiri should deal with it.. :scorps:
Nah, seriously though, beating them up isn't always possible or practical, especially in school. It brings you down to their level whether you like it or not, and if the bully has better physical prowress than you, you're gonna make yourself look like an idiot in front of everyone.
Indirect revenge is the best way, like the laxative idea. Make sure that the bully knows you aren't bothered and if possible just laugh at them. Learn a form of self-denfense, it will give you a good confidence boost.
Physical bully tips for defense
-A quick kick in the groin will make the person feel dazed and look embarrassed long enough for an escape. Bullies aren't always used to others getting the best of them.
-If the bully's grabbing you or pushing you, it's actually an advantage. Try real hard to keep your balance. Grab one of his arms with your left hand and hit his / her elbow with the other. Then, using your left hand, push away the remaining arms.
-If the groin doesn't work, try hitting right below the ribs, or kick a knee to make the person trip.
If you want to play bad, any prized/sentimentally valuable possesions you can get your hands on, chuck 'em.