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

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

double tubbing 

the act of middle aged couples bathing al fresco in side by side tubs. a stunt intended to be erotic posed by people least likely to pull it off, never mind tear it off. an unlikely scenario proffered for your consideration by the manufacturer of an erectile dysfunction palliative.

hey, babe, i think i'm feeling froggy. lets throw all restraint to the winds and give ourselves completely to this moment of passion if we can find two tubs side by side somewhere in the open air. i'll give you a drubbing in some double tubbing.

double tubbing by lexicali slim September 16, 2009

green thumbing 

Someone who cheats while playing "Guitar Hero" by placing a rubber band around the green button, limiting the number of buttons one needs to press, in order to obtain a higher score on the Hard or Expert difficulties.

"Dude! Did you hear that John got 100% on "Through The Fire and Flames???"

"Whatever. I heard he was green thumbing. I'd have to see it to believe it."

green thumbing by Gustafae March 9, 2008

Hot tubbing 

When two experts on opposing sides of a court case are put in a witness box to debate an issue, while the courtroom observes.

Used in various international courts to determine which expert is more credible.

We have to prepare the expert to go hot tubbing with Dr Smiles. He is a real shark.

Hot tubbing by Humphreyneworleans May 20, 2016

thumbing 

The hip new way to indicate you are texting. Matter of fact; all the really cool kids now refer to texting as "thumbing."

Jenny and I were thumbing most of math class today.

(another correct usage would be)
Thumb ya later!

(another correct usage would be)
I will thumb you later.

thumbing by Cyprus Denton Fekks October 1, 2011

thumbing off 

the process of clicking on your own submissions thumbs up button

like jerking off your ego

That idiot spends the whole day on various websites just thumbing off

example 2: every time i check my urbandictionary entries i end up thumbing off

thumbing off by streigh July 23, 2009