Masterboater

A female that motorboats her own breasts.

Hey Kaitlyn I can motorboat my own boobs! Hey Kim you're a masterboater!

by KennethG October 4, 2014

Masterbotorium

An assigned room for masterbation

Gerald spent hours in his masterbotorium knuckling his nudger to various brazzers movies!

by Db9790 July 7, 2017

mastergta11

mastergta11 is a non-gay non-pedo Minecraft gamer who has never ever sent pictures of his itty bitty dick to any underaged 15 year old boys ever in his entire career and is apart of the highly skilled group of Megawalls players called The Jungle. He is truly undefeated.

Hey look, there's mastergta11! I hope he eats out my boypussy and sends me pictures of his bush!

by Armstretcher guy May 5, 2020

Masterlocked

A way of attacking someone in prison. You get hold of a padlock via paying off guards of stealing one of a gate and put it in your sock. Get 8 other people to do this and then beat the victim to death with them.

Did you hear? Dave got masterlocked!

by udking420 June 28, 2020

Mastergating

Binge watching Stargate SG-1 (or other Stargate series/movie).

“Tyler, quit mastergating and help us clean for the party.” - Chris

Past tense: “Tyler mastergated in his room all afternoon.”

by TheBenAflack November 23, 2020

mastermom

a person who makes alot of jokes you would only understand if you know them in person.

"Your mom's a man" is a joke that mastermom would say

by theBIGmansTOES December 2, 2020

masterbortion

an instance where one has been masturbating alone in his/her house and is approaching climax, and has to stop because mom came home and she wants you to bring in the groceries or take up your time in some other lame way that resembles the opposite of orgasm.

I was jerking off to a UFC fight but had a masterbortion when my mother came home and made him plumb a turd out of the toilet.

by chef jugfuck October 31, 2008