Bullying is the use of force, threat, or coercion to abuse, intimidate, or aggressively dominate others. The behavior is often repeated and habitual. One essential prerequisite is the perception, by the bully or by others, of an imbalance of social or physical power, which distinguishes bullying from conflict. Behaviors used to assert such domination can include verbal harassment or threat, physical assaultor coercion, and such acts may be directed repeatedly towards particular targets. Rationalizations for such behavior sometimes include differences of social class, race, religion, gender, sexual orientation, appearance, behavior, body language, personality, reputation, lineage, strength, size or ability. If bullying is done by a group, it is called mobbing.Bullying can be defined in many different ways. The UK has no legal definition of bullying, while some U.S. states have laws against it.Bullying is divided into four basic types of abuse – emotional (sometimes called relational), verbal, physical, and cyber. It typically involves subtle methods of coercion, such as intimidation.