Thumbing 

The act of going AFK with no warning.

"Where did John go?"

"I don't know; he might be AFK."
"Damn, he thumbing for real."

Thumbing by wassykicks July 9, 2023

thumbing 

Strumming a guitar with your thumb instead of a pick because you’re tired of losing it or dropping in your guitar

“I got tired of losing my pick so I just started thumbing my guitar instead”

thumbing by Somedude778 October 22, 2023

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

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

thumbing the cookie

The act of group sex whilst listening to obscenely loud rock music and eating jaffa cakes

HEY JONNIE, STOP THUMBING THE COOKIES AND GET YOUR CANDY ASS OVER TO THE STUDIO FOR SOME HARDCORE ROCK-TUNEZ!!
or something to that effect

thumbing the cookie by Albert Q Fuxbridgingberry March 16, 2004

thumbing it in slack 

When a man fails to achieve an erection but is undaunted and proceeds to push his penis into the vagina or more commonly anus and attempts sloppy sex by pushing in his penis with his thumb.

Nathan - Aww man im going to jail. imma be some guys bitch. i hope they are tender and start by thumbing it in slack

thumbing it in slack by SGTKM December 1, 2010