sadistic has definitions from the field of sexuality
[ adjective ] (sexuality) deriving pleasure or sexual gratification from inflicting pain on another

Used in print

(Leo Lemon, "Catch Up With" and "Something to...)

Cause of all this commotion : squat , pug-nosed , balding , hopelessly ugly Jean-Pierre_Bravado , a Bogartian figure , who plays a sadistic , amoral , philosophic Tasti-Freeze salesman in old New-Waver Fredrico_de_Mille_Rossilini 's endlessly provocative film , A_Sour_Sponge .