From Longman Dictionary of Contemporary Englishsadistsa‧dist /ˈseɪdɪst/ noun [countable] MPCRUELsomeone who enjoys hurting other people or making them suffer → masochist
Examples from the Corpus
sadist• The man was clearly a sadist.• Karl's a sadist, he enjoys inflicting pain.• Andrea's father was an absolute sadist. It's not surprising she hates him.• You turned me into a goddamn sadist be-cause of your goddamn stinking country stubbornness.• He says it's some kind of sadist that carries out this kind of attack.• The man was a raving sadist, she thought, and then realised it was a requirement of his job.• They tend to be the sadists.• The sodomite captain proves brave, the sadist a bungler.• He brings out the sadist in me. 