masterpotation 

Microwave a potato, then fuck it! Then profit

Masterpotation is very fun Lauren don't judge!

masterpotation by LollyHammer December 1, 2015

masterPEnation 

the process of masterbaiting WHILST watching penile examination video's on youtube, for perferts that like men only.

Joe's a real fagget he was MasterPEnation ing to my dad

masterPEnation by Joe the masterPEniler master September 3, 2009

Mastertation 

(n): One's master's thesis. A research document written by a graduate student to complete a master's degree.

also (v): to mastertate

Have you finished your mastertation yet?

You betcha! I just mastertated in front of my faculty committee.

Mastertation by Herschel Speiderman March 28, 2009

Masterbutation 

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."

Masterbutation by supermelon928 December 24, 2007