1935 . [ see sado-masochism] 
1954 B. Karpman Sexual Offender ix. 131Alcohol is the illegitimate satiation of appetite which she fights in obsessionalism based on sado-necrophilia. 
1964 Observer 30 Aug. 28 Client prints paperbacks for all tastes from (I think) the nasty sado-snobbism of poor Fleming to Tolstoy. 
1970 Guardian Weekly 11 Apr. 19 A kind of all-senses collage assembled from bits of girlie photos, tropical stills, and mock-ups of sado-erotic temple carvings. 
1976 New Yorker 26 Apr. 121/1 Given the sado-erotic content of the film{ddd}one tends to make Grace a woman. 
1980 R. Ludlum Bourne Identity xiii. 195The sado-romantic myth turns into a brilliant, blood-soaked monster who brokers assassination. 
ORIGIN: from sadism sadistic -o-