masturfuck 

The process of nearly whacking it to a picture of someone you like but right before you're about to cum she walks in and you grab her quick and shove your dick as far up into that motherfucker as you possibly can before jizzing

Devin: Shit bro i totally masturfucked sally today right through her jeans

Jason: I feel you bro, I masturfucked laura so hard i passed out with my schlong still 10 inches up her ass

masturfuck by Chome September 10, 2013

Masturfaker 

A guy who claims he doesn't masturbate

"Jimmy says that he doesn't masturbate."
"What a masturfaker!"

Masturfaker by Goddess by nature August 13, 2009

Masturquake 

The cumulative effect of all internet users masturbating, making the ground shake.

"Did you feel the masturquake after that video of the naked chick playing the Wii was posted online?"

Masturquake by Alex Po WT February 25, 2008

Masterfucked 

The superlative needed when "fucked" just isn't a good enough description.

"That midterm masterfucked the shit out of me."

Masterfucked by isteratter October 23, 2010

masturjacking 

Masturbation in an extreme sense.

He was perched up on the sink like a monkey, bent over and masturjacking like there was no tomorrow.

masturjacking by Eiden December 1, 2003

masterfuckingbate 

When you masterbate with such passion and thrust that you are taking off like a fucking rocket.

Today, I masterfuckingbated to Maria Tara Ryabushkina’s lesbian adventures. God!, she is so fucking hot!

masterfuckingbate by Bad C dev October 7, 2021

Masturjack 

To jack-off, fap or to masturbate.

I'm gonna masturjack to you're face!
I'm gonna masturjack all ova yo face!

Masturjack by LEEstar March 15, 2011