Gransturbation 

A seemingly innocent act, following the acquisition of moist grey pubes, whereby a nanna absentmindedly strokes her minge.

Nanna Doris was taken aback to find her knickers full of clitty litter after a lengthy gransturbation session, listening to the Mull of Kintyre.

Gransturbation by Loxastic April 17, 2020

Gasturbation 

The act of shaking the gas pump to get those last few precious drops of gas out of the hose that you paid for and you deserve.

Man, that guys a cheap bastard, he's been shaking that thing for damn near a minute now, that's some serious gasturbation

Gasturbation by TheFitz19 June 25, 2009

Gaysturbation

When you have sex with a clone of yourself.

Person 1: If you have sex with a clone of yourself, is that gay or masturbation?
Person 2: Nah fam, It's gaysturbation.

Gaysturbation by ProfessorPancakes June 1, 2018

gangsturbation 

The act of masturbating in a group, such as in a circle jerk or in a game of limp biscuit.

When Timmy dropped his pants along with his friends for a round of circle jerk gangsturbation, they laughed out loud at how small his manliness was.

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Mark H. Proud Urban Dictionary Slang Author since February 2004.

gangsturbation by Mark H November 11, 2005

Grassturbation

Sexually stimulating one’s self with the thought and process of excessive lawn care, grass mowing, and other yard maintenance activities.

Do you think he goes home and stimulates throgu grassturbation? Grassturbates maybe?

Grassturbation by TheLightningPhoenix September 3, 2020

transturbation 

masturbating while riding on public transportation

Person #1 : Does that bum have his hand down his pants while staring at me?
Person #2 : Haha classic, transturbation on the city bus.

transturbation by Magnen July 20, 2010

Graphturbation 

To become overly excited, geeky, obsessed and possibly aroused by the graphics of a computer game and or its characters from gameplay or artwork aswell.

When that new game came out he talked so much, I believe he was in a state of graphturbation

Graphturbation by Warsailor March 28, 2013