Wiktionary
n. A childhood disorder characterized by an ongoing pattern of anger-guided disobedience, hostility, and defiant behavior toward authority figures.
Wikipedia
Oppositional defiant disorder (ODD) is defined by the DSM-5 as "a pattern of angry/irritable mood, argumentative/defiant behavior, or vindictiveness lasting at least six months." Unlike children with conduct disorder (CD), children with oppositional defiant disorder are not aggressive towards people or animals, do not destroy property, and do not show a pattern of theft or deceit. A diagnosis of ODD is also no longer applicable if the individual is diagnosed with reactive attachment disorder (RAD).
Usage examples of "oppositional defiant disorder".
Half or more of ADHD children are also diagnosed Oppositional Defiant Disorder (with the subtle implication that there is more than a brain disorder here) or Conduct Disorder.