shassturbating 

The act of vigorously inserting your thumb into and out of your rectum while masturbating in the shower.

Chris blew his load everywhere when he was shassturbating this morning.

shassturbating by Mytinylittlehand May 7, 2017

shapesturbating 

The act of masturbating in a crowded room (usually 4-6 people) without their knowledge, and then proceeding to dive your semen soaked hand into a pack of shapes. Afterwards, you can either wash your hands or lick the now flavor packed semen off of your fingers

Ben: Dude, did you hear what happened in Cabin 9 last night?
John: No what happened?
Ben: Apparently Xavier was shapesturbating
John: That's disgusting

shapesturbating by Jernandez December 3, 2016

Super Smashturbating 

When equips "Hulk Hands" (batteries installed to produce factory noises) and the proceeds to masturbate.

Also see: smashturbating

I heard my twelve year old super smashturbating from down the hall.

Super Smashturbating by The Powerhouse May 7, 2009

Smashturbating 

When one equips themself with "Hulk Hands" and then proceeds to masturbate.

Also see: Super Smashturbating

I caught my twelve year old smashturbating with his Christmas present.

Smashturbating by The Powerhouse May 7, 2009

Super smashturbating 

Jerking off to super smash bros

My son was super smashturbating to day

Super smashturbating by GUY GUY May 18, 2015

slasturbating 

masturbating in your sleep

Jimmy fell asleep with his dick in his hand and woke up with semen all over him and exclaimed, "Shit, I was slasturbating again!"

slasturbating by shittydrumsalot October 26, 2009

smashturbating 

Playing any Super Smash Brothers game by yourself.

Tony is smashturbating at home because nobody will play melee with him.

smashturbating by slayertokey February 8, 2010