What is bullying? It's more than just being rude or a jerk. It is deliberate, disrespectful and repeated behaviour targeted to an individual or group.
Bullying takes place all over the place. Online, at home, in school, at church, at work, even in the senior's home. It appears to be getting progressively worse. It unfortunately even ends up in severe depression, suicide, or fighting and related crime.
If you know of a situation where bullying is taking place, talk about it with a trusted professional. Document the "evidence". Seek proper advice. Often, the advice will be to confront the individual. Never will the advice be to be a bully back by fighting. **I am not a professional anti-bullying-advice-giver.** If you're a teacher, go to your teacher's union (like the ATA).
Bullies are often victims themselves from other circumstances, and their bullying behaviour results from their emotional imbalance. They need their own love and support, as well as the victim of the bully.
The solution is this: Stop It!