also sadomasochist, "one afflicted with sado-masochism," 1919; from combining form of sadist + masochist. Attested in German from 1913. Related: Sadomasochistic; sado-masochistic. Earlier was sadistic-masochistic (1892).
"one who derives satisfaction from inflicting pain on or dominating others," 1892, from sadism + -ist.
"one who is given to masochism," 1895, from masochism + -ist.