A misbehaving child is often referred to as a BRAT (4 letters) or an IMP (3 letters). This term is used to describe a child who exhibits disruptive, disobedient, or rude behavior. Such behavior can range from minor infractions such as talking back to adults, to more serious offenses such as vandalism or physical aggression. The term is often used to describe children who are difficult to manage and may require additional discipline or guidance.