thumbering 

Using your thumb for screen control for handheld device

The iPhone 6plus is not thumbering user friendly.

thumbering by Men of PH February 19, 2015

Thumbering 

When you use your Thumb to finger someone or something.

Thumbering the hole is often the best way to get proper leverage, it allows for additional control and a tighter fit.

Thumbering by StrongB January 12, 2022

Cross-Thumbing 

Cross-Thumbing is a technique developed by Dr. Mark Ringwald PhD. and Dr. Nick Pollack PhD. at their video gaming ergonomic laboratories at Brandeis University. The technique is mostly applied when playing the Nazi Zombie segment of "Call of Duty: World at War". The technique consists of controlling the right thumb stick of an XBox 360 controller with one's left thumb while the right thumb is occupied with pressing one of the four buttons above the right thumb stick. The crossing over of the left thumb across the center of the controller, and in said gaming application is most useful while rebuilding barriers in the zombie level's windows to slow down the flow of zombies in the house. The technique allows the player to repair said barrier as well as aim and dispatch targets within the level.

Holly shit Doo, did you see that fucking sick cross-Thumbing stabbing action on that mother fucker? I cut his fucking dome off, NOOCH!!!!!

Cross-Thumbing by Cactus Jack O'Malley March 5, 2009

Thundering Molly 

When shagging a lady with spectacles, quickly pull out stick her glasses on your cock and spunk in her eye (no specific one)

I gave your mum a Thundering Molly last night ;)

Thundering Molly by Ace19888888 February 13, 2019

Thumbing Your Nuts 

Wasting time doing absolutely nothing. Usually in a work setting.

Dave: Have you accomplished anything today?

Paul: Hmmm, well, I did make some copies.

Dave: You've just been standing around thumbing your nuts, haven't you?

Thumbing Your Nuts by SteelerB56 February 28, 2011

thumbprint

A thumbprint is a method of consuming a massive amount of lsd, where a massive (relatively, compared to a blotter dose) amount of lsd crystals are made into a small pile, pressed on with a thumb, and then the thumb into the mouth.

A thumbprint is, despite the large dose is not at a high enough level to reach levels of toxitiy in the human body.

When's the last time you had enough lsd crystals to thumbprint, eh?

thumbprint by cyan April 24, 2005

thumbing in a softie

The term given to pushing a flaccid penis into the vagina.

Drunk dude: Im too pissed, its never gonna work
Female: Cmon work with it otherwise ill fuck your friends
Drunk dude: Well alright ill try thumbing in a softie.

thumbing in a softie by Jared Ellis January 18, 2008