when you text someone and rethink your message as your clicking the send button and you pull your finger down on the screen so It won't send
I was texting Alex last night and was going to tell him I liked him at the last second I thumb rolled so i didn't fuck up
by yoter May 28, 2015

"Thanks to Chucky's beer thumb, we had no clue the cops were conducting a sobriety checkpoint at the golf course entrance."
by bearded steamer October 13, 2011

Verb. Used to define when two men sit down at the same time while making a thumbs up gesture on the seat next to them, proceeding to insert their thumbs up the other individuals rectal cavity.
John: hey you wanna play thumb wars while we watch house hunters?
Joe: yeah I'd love to but only if you spit on it first.
Joe: yeah I'd love to but only if you spit on it first.
by Yee Olde Jew February 19, 2022

The act of, rather than sticking your thumb in her ass while you're fucking her, you pull out, shove it in her ass, and plug her vagina with your thumb
by Boost_and_chill May 20, 2021

"The fact that pages 136 & 137 were stuck together in the Hustler magazine at the sperm bank was an obvious indication that someone had been there cum thumbing it previously."
by billebllunt December 31, 2013

In Messaging, a subtle inquiry as to whether the other party composes text and thoughts at the same crawl.
by Zappin' Nap April 29, 2021

A Thumb Bump is a fist bump with a thumbs up to finish it off. Originated on classic TV show Thunder in Paradise. Randolph "Hurricane" Spencer and Martin "Bru-dog" Brubaker would do a Thump Bump to celebrate a job well done.
by HurricaneSpencer August 12, 2022
