Oppositional Defiant Disorder What is Oppositional Defiant Disorder? Oppositional defiant disorder (ODD) is a childhood behaviour problem. A child with ODD won’t do what people ask, thinks that what she/he is being asked to do is unreasonable, and gets angry and aggressive about being asked to do things. Around one in 10 children under the … Continue reading Oppositional Defiant Disorder