Monsterface

The act of simultaneously ejaculating and passing a kidney stone on a woman's face.

"Dude, I gave Jenny a Monsterface last night and now she won't call me back."

"I was screamin' like Goku giving Martha the ol' Mosterface bro!"

Monsterface by Vibekilla June 29, 2016

Monsterbate 

1. To masturbate in an intense and/or earth-shattering manner.

2. The form of masturbation someone monsterous in personality or appearance exclusively utilizes.

3. An actual monster's masturbation.

"He doesn't simply masturbate to Angelina Jolie, he MONSTERbates to her."

"The Undertaker is only capable of monsterbation - masturbation for him is out of the question."

"Cookie Monster has been known to monsterbate off the SCENT of a cookie alone."

Monsterbate by Jeanette M. April 2, 2008

Monsterfucker

Wanna fuck a werewolf? Ya a monsterfucker.

Wanna fuck a ghost? A Zombie? That's necrophilia But counts! you heathen.

Wanna fuck Dragon? (Unless in human form) Beastitality! And ya a monsterfucker!

Pop a boner going through r/bodyhorror? Here's your crown!

Person 1: Ooo! Look at his teeth!

Person 2: They are pointy and jagged! You monsterfucker!

Person 1: Ooo~ Tentacles give~

Monsterfucker by There_be_monsters_here February 17, 2021

monsterfail 

when someone fails extremely hard (see fail) this word can be used.
it is derived of the PC game Unreal Tournament, where a massive amount of consecutive killing led to a "Monsterkill!".

Dude 1: Damn, I got ditched by this chick yesterday even though I was SO sure she loved me!
Dude 2: M-M-M-MONSTERFAIL!

monsterfail by I wish i was a pretty girl September 27, 2006

Monsterate 

A synonym for PMSing

Wow, Phoebe and Madeline always monsterate so bad around this time of the month.

Monsterate by The Lone Will February 26, 2011

MonsterFreak 

a one man ass kicking machine.

I was Playing Call of duty MW2 and Matt is on there beasting like a MonsterFreak.

MonsterFreak by joltfreek May 29, 2010

Monsterfucking 

The act whereas one chugs 17 cans of Monster energy drink then proceeds to fornicate with drywall.

Yo, Kyle was Monsterfucking a hole in my parents living room. I gotta spackle that shit after I clean off his spackling.

Monsterfucking by Wookieflookieflame August 19, 2021