Source : WordNet®

hebephrenia
     n : a form of schizophrenia characterized by severe
         disintegration of personality including erratic speech
         and childish mannerisms and bizarre behavior; usually
         becomes evident during puberty; the most common
         diagnostic category in mental institutions [syn: {hebephrenic
         schizophrenia}, {disorganized schizophrenia}, {disorganized
         type schizophrenia}]