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

by cumdiddlediddle May 20, 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

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

Guy 1: ayo bro, I gave her the kentucky thumb
Guy 2: I heard about that from ak Jesus, that's sick bro
Guy 2: I heard about that from ak Jesus, that's sick bro
by Sp1cy_wat3r May 20, 2021

The ancient phallic symbol of male virility, used today as a means of providing comfort and validation to sentimental wussies.
by Masterofnom September 27, 2019
