Someone who enjoys pain, or who derives pleasure from harming oneself or being harmed by others(noun)
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Use "masochist" in a sentence
"If you go back to the DocBook V4. x DTDs and study the parameter entity structure [ "masochist" - ed], you'll find a few places where we twisted the parameter entity structure pretty hard to avoid exactly this problem."
"He used the word "ethno masochist" to describe President Obama's mother, Ann Dunham, a woman who married first a Kenyan national and then a man from Indonesia."
"The relationship of the sadist to the masochist is the relationship of the present to eternity."