monsterbation 

The act of masturbating while going "RAAAAAAWWWRRR!" Like a monster/dinosaur

Max decided to experiment with monsterbation, but the noise made his mom come to his room, and discover what he was doing.

monsterbation by Maudlin La An April 1, 2010

Monsterbeast 

A term used to describe some one whom with their great skill has defeated you. Also popularly used to describe the plus 4 card in UNO. Monsterbeast can also be used to describe the toughness of something.

A group of friends are playing Halo. Plex you monsterbeast!
Another example is a group of friends playing Uno. Hey man you got a crazy look in your eye. Why yes I do it's because I got a monsterbeast!

Monsterbeast by Jonathon McElwain April 1, 2007

Monsterbating 

to pleasure yourself while drinking a Monster energy drink.

Igor seems hyper and distracted, he must be monsterbating.

Monsterbating by Tayvi February 4, 2010

monseratt 

Monseratt is a very beautiful girl . Most of them are tall and any guy will die to be her boyfriend, she is shy at first but once you get to know her she will mess around a lot. Monseratt is very good at fashion. She had the best winning award smile her laugh is everything. A Monseratt is a best girlfriend,best friend , sibling you can ask for .

Dammm I wish I knew someone name Monseratt

monseratt by Monseratt May 29, 2018

Monsterbating 

When you jerk off so hard that its scary but it feels so good that you wanna squirt EVERYWHERE!

To being jerked off really hard and vigorously.

Honey! Why are you jerking off so hardddd!

Oh don't worry honey, I'm only monsterbating it doesn't hurt.

Monsterbating by Kajur April 2, 2013

Monsterbating 

The act of masturbating under one's bed or in one's closet with the intent to frighten.

Greg was scared shitless when he found Aaron monsterbating in his closet at 3 am.

Monsterbating by TheProfessor42069 October 14, 2011

Moisterbate 

The act of masturbating furiously with extremely sweaty or clammy hands, creating friction burns on the shaft and making it impossible to finish.

Dude I was moisterbating so tough last night and now my cock burns like a mother fucker. I won't be able to jerk off for at least a week.

I hate it when my dick bleeds after I moisterbate hard with my sweaty hands. It just completely ruins my day!

Moisterbate by Chief Fat Cock February 23, 2011