Guy 1:Man, I think steve's masturbating again.
Guy 2: From the sound of it, he ain't just masturbating, he's MASTERbating.
by Sir Fizwheel Humperdink September 23, 2007
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when you masturbate too fast for a long period of time and as a result lose focus, become flaccid, and have to start all over again.
Patient: Hey Doctor, yesterday I was masturbating and everything was fine until I just went soft, whats wrong?

Doctor: Don't worry, you were just "masterbeated."
by El Jalapeño August 15, 2011
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"Yo dude! Lets go masterbate together!", said the 10 year old.
"Hell yeah!", replied the old man.
by MasterMastur. September 3, 2009
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a common mispelling of the word "masturbating", which is the ING form of wordmasturbation
1337_g33k: Im masterbating to porn
Normal person: Good to know.
by Anonymous March 16, 2003
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when a guy gropes his penis thinking about a girl, and then shoots out the substance inside of the penis
one of my friends was really horny and so he masterbated and jizz came out...
by Master at sex February 21, 2005
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simple practice of solo sex.probably not one teenage male that hasn't done it in your hometown,unless they are of course that kinda funny guy that just won't ever seem to converse about sex or girls.see limp dick motherfucker
i probably could not go a week without masterbation
by pothhead October 18, 2008
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