mass - tur - byoo - tay - shun
1. n. The act of combining masturbation with mutilation. The word is a combination of the words Masturbate and Mutate, although mutation is not part of the process.
"That guy is so badass. I heard he Masterbutates."
"Holy shit, masterbutation just scares me. Call me a bitch, but I just don't think I could do it."
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