slum: a district of a city marked by poverty and inferior living conditions
city district: a district of a town or city
antisocial personality disorder: a personality disorder characterized by amorality and lack of affect; capable of violent acts without guilt feelings (`psychopathic personality' was once widely used but was superseded by `sociopathic personality' to indicate the social aspects of the disorder, but now `antisocial personality disorder' is the preferred term)