An alternative to having intelligent conversation with other people, in which you have a conversation or debate with yourself, either aloud or in your head. Often caused by the absence of intelligent friends or acquaintances.
Man, my friends are such idiots. I have to mindsterbate every night.
by mes-toa October 15, 2005
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The act of masterbating without using any masterbatory aids such as pronography.
Friend 1- Why didnt you answer your phone?

Friend 2- Sorry, I was mindsterbating to the memory of those two chicks kissing at the party lastnight.

Friend 1- You're pathetic.
by Jack Hambit March 17, 2011
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When your mind is only focused on having sex with a hot celebrity and your girlfriend, to where absolutely nothing can break you from your sexual daydream.
Billy: Dude what's wrong with Hunter?

John: He's thinking about having a 3-way with Katy Perry and his girl Emily.

Billy: Classic case of Mindsterbation?

John: Yup.
by A pro mindsterbator August 11, 2010
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derived from the term mind-fucking, where when mind fucking one self, one tends to mindsterbate, therefore the word directs towards the situation to when a person is fucking with ones on mind he tends to be mind-fucking
Joe: I have been fucking with my mind, with all this arithmetic and alcohol

Harry: Yeah dude I guess mindsterbation of a higher form
by Maverickan September 5, 2012
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