thumb thumb 

rotating the wrist with hand out straight so that the side of the tumb bangs on a desk. In a thumb thumb this is done twice in succession. This is used by teens taking their exams to signal to others around them they are finished and bored. This usually recquires another thumb thumb as a ressponse to show that it is understood and that the second person is also finished and bored.

(silence)
Jay: (thumb thumb)
(silence)
Tom: (thumb thumb)
(silence

thumb thumb by Jason Shettland March 22, 2009

thumb in or thumb out 

Asking if penetration of butt on girl during sex is ok.

Thumb in or thumb out baby?

thumb in or thumb out by EMC57 March 1, 2025

New Rule of Thumb 

The new rule of thumb is the publicly sanctioned male violence against women that do not comply with the current ideology. The Biden administration has exacerbated this by claiming attacks on certain groups.

Swimmer Riley Gaines just got assaulted by a male for speaking up about women’s rights. This day and age, the new rule of thumb allows males to beat women for speaking.

New Rule of Thumb by Le11223344 April 7, 2023

Kentucky Thumb 

The Kentucky Thumb is a world renowned lifesaving and lovemaking technique invented by Scott DeShields of Kentucky Ballistics himself after quite the unfortunate romantic encounter with some "hot" slap rounds, (the name gives it justice). As such the term was established as a method for multiple uses; for example plugging a severed carotid, loading firearms, and poking eggplants.

Everyone: Wait, Scott is still alive?
Scott: Saved again by the Kentucky Thumb.

Kentucky Thumb by Seven_Corn May 20, 2021

The Kentucky thumb 

The Kentucky thumb is after a sexual maneuver you stick your thumb in her anus to make sure she is all right

Hey Scott, I heard you gave your girl the Kentucky thumb last night

The Kentucky thumb by Goddangitbobby May 20, 2021

stick out like a sore thumb 

To be easily noticed. To have something obvious going on.

Jane: Do you think i should put on my multi colored hat & gown?

John: No i don't. You're just gonna stick out like a sore thumb.

stick out like a sore thumb by mehcee May 11, 2014

Griptape thumb 

A very common skin condition that affects many skateboarders, griptape thumb is the wear and tear of the skin on the thumb caused by new griptape (an adhesive-backed, sandpaper-like sheet applied to the top of a skateboard which gives the rider grip).

To prevent griptape thumb, wrap your thumb in medical tape before a skate session.

Griptape thumb by StickyMikeD November 24, 2009