Masterbeef 

To lift weights in the gym by yourself

Dude this sucks i don't have a lifting partner, i always have to masterbeef.

Masterbeef by Yendricklamar July 21, 2017

Masterbeast 

To masterbeast is:

1) To play alone in a multiplayer game by yourself because your friends don't want to play with you.

or

2) To be a badass when the rest of your team is down and out.

1) Yesterday I was masterbeasting because you guys didn't want to play with me.

2) Damn all you fools suck, I had to masterbeast for us to get through the last round.

Masterbeast by THE ON3 November 2, 2011

Grand Master Beef 

The Most holy being on the face of the planet he is a god amoung man can keep all the woman in the world happy for ever

Terri: hey i went to see Grand Master Beef last night
Amanda: And...?
Terri: i didn't know there was anything beyond a multiple orgasm!!!

Grand Master Beef by Airsoft God June 5, 2007

masterbesober 

Being sober from masterbation.

Guy 1: Hey stop checking out every chic that passes by

Guy 2: Give me a break. I've been masterbesober for days

masterbesober by master son April 28, 2011

Masterbreading 

Pleasuring your reproductive organs with bread

"What's she doing" said Joe "Probably Masterbreading upstairs"

Masterbreading by Masterbreader May 9, 2018

masterbreak

taking a break from something you SHOULD be doing to masterbate just because you have the time

Im tired of folding clothes. think I'll take a masterbreak.

masterbreak by junewho August 4, 2008

Masterberrying 

The act of viewing and sending messages on a Blackberry while holding it underneath a table to hide the act.

1. Man, I was masterberrying like a fiend in that meeting.

2. The boss totally caught me masterberrying last week.

Masterberrying by Mendeleev August 28, 2008