A bully is someone who uses their physical, social, or emotional power to intimidate, harm, or control others. They may use physical violence, verbal abuse, or exclusion tactics to assert their dominance and feel powerful. Bullies often have low self-esteem and may feel compelled to put others down to feel better about themselves. However, their behavior is not excusable, and it can have serious consequences for their victims. It's important to stand up against bullying.