A hebephrenic is a person suffering from hebephrenia. Hebephrenia is an outdated term for one of the classifications of schizophrenia. Behaviors associated with hebephrenia are:

• extreme anti-social behavior
• incoherent shrieking
• self-mutilation
• ingesting feces

Hebephrenic subjects can be absolutely terrifying to observers. This category of schizophrenia is usually associated with a disrupted or incomplete stage of childhood.