Oppositional Defiant Disorder (ODD) is a behavioral disorder characterized by a persistent pattern of angry or irritable mood, argumentative or defiant behavior, and vindictiveness that lasts for at least six months. Individuals with ODD often have difficulties regulating their emotions and impulses, which can lead to conflict with authority figures, such as parents, teachers, or other adults.

The symptoms of ODD typically begin before the age of 8 and can include: frequent temper tantrums, arguing with adults, actively defying or refusing to comply with rules or requests, deliberately annoying others, blaming others for their own mistakes or misbehavior, and showing hostility or resentment towards others.