Masterbeat 

to masturbate whilse eating.

I masterbeated on your bed while you were at work, so watch out for the spooge on the bottom left corner.

Masterbeat by supertrooperdude_69 September 25, 2009

masterbeat 

The art of intensily jerking your body to the beat of a song

"Dude sean, fist pumping is my favorite way to masterbeat".
"Yesterday I was home alone so I turned up the music and started to masterbeat until I was pouring swet".

masterbeat by White Tux May 30, 2013

masterbeat 

masturbate.

Man i got a fat nut to bust, im gonna go masterbeat.

masterbeat by drizue. May 16, 2003

masterbeat 

The greatest beat in the universe.
Presides over all other beats and makes sure they dont screw up.
If any beats don't meet Masterbeat's standards they create poor record sales.

"Man, that beat was whack. I hope you dont show it to Masterbeat!"

"Hey that song is number one, it must've been approved by Masterbeat."

masterbeat by Jedimintrick October 25, 2006

Maskerbating 

Wearing a mask while completely alone

Before I even realized it, I was maskerbating in my car yesterday!

Maskerbating by Photoist July 28, 2020

Masterbathon 

a masterbathon is a day that you stay home from school "sick" so you can beat off so many times that you are dry and chaffed and can't walk so the next day you have to stay home and do it all over again

Mike: "Damn jimmy has been out of school all week"
Steve: "I konw he must be having a masterbathon"

Masterbathon by LifeguardSteve April 27, 2004

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