<unk>  is a personality disorder involving sadomasochism that appeared in an appendix of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R). The later versions of the DSM (DSM-IV, DSM-IV-TR, and DSM-5) do not include it. The words sadism and sadist are derived from Marquis de Sade.
Sadistic personality disorder
Self-defeating personality disorder
Haltlose personality disorder
Histrionic personality disorder
Dependent personality disorder
Cluster B personality disorders
Avoidant personality disorder
Immature personality disorder