Bullying is a repeated aggressive behavior that involves an imbalance of power or strength. It can manifest in various forms, including physical, verbal, and social bullying. Physical bullying involves harming someone physically or threatening to do so, while verbal bullying includes name-calling, insults, and derogatory comments. Social bullying, on the other hand, aims to harm someone's reputation or relationships, often through exclusion or spreading rumors. The key characteristic of bullying is that it is intentional and occurs repeatedly over time, making it a serious issue that can have lasting effects on individuals, particularly children and adolescents.