Illustration of a bully Share of children who report being bullied (2015)<unk>  is the use of force, coercion, hurtful teasing or threat, to abuse, aggressively dominate or intimidate. The behavior is often repeated and habitual. One essential prerequisite is the perception (by the bully or by others) of an imbalance of physical or social power. This imbalance distinguishes<unk>  from conflict.<unk>  is a subcategory of aggressive behavior characterized by the following three criteria: (1) hostile intent, (2) imbalance of power, and (3) repetition over a period of time.<unk>  is the activity of repeated, aggressive behavior intended to hurt another individual, physically, mentally, or emotionally.<unk>  ranges from one-on-one, individual<unk>  through to group<unk> , called mobbing, in which the bully may have one or more "lieutenants" who are willing to assist the primary bully in their<unk>  activities.<unk>  in school and the workplace is also referred to as "peer abuse". Robert W. Fuller has analyzed<unk>  in the context of rankism. The Swedish-Norwegian researcher Dan Olweus says<unk>  occurs when a person is "exposed, repeatedly and over time, to negative actions on the part of one or more other persons", and that negative actions occur "when a person intentionally inflicts injury or discomfort upon another person, through physical contact, through words or in other ways". Individual<unk>  is usually characterized by a person behaving in a certain way to gain power over another person. A<unk>  culture can develop in any context in which humans interact with each other. This may include school, family, the workplace, the home, and neighborhoods. The main platform for<unk>  in contemporary culture is on social media websites. In a 2012 study of male adolescent American football players, "the strongest predictor of<unk>  was the perception of whether the most influential male in a player's life would approve of the<unk>  behavior." A study by The Lancet Child & Adolescent Health in 2019 showed a relationship between social media use by girls and an increase in their exposure to<unk> .<unk>  may be defined in many different ways. In the United Kingdom, there is no legal definition of<unk> , while some states in the United States have laws against it.<unk>  is divided into four basic types of abuse – psychological (sometimes called emotional or relational), verbal, physical, and cyber. Behaviors used to assert such domination may include physical assault or coercion, verbal harassment, or threat, and such acts may be directed repeatedly toward particular targets. Rationalizations of 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<unk>  is done by a group, it is called mobbing.
Bullying
Self-hatred
Thought broadcasting
Wandering 
Mindfulness
Compulsive talking
Fear of trains
Self-harm