Rule of thumb

A rule of thumb is a general guideline or basic principle that people use based on experience, not an exact rule or law.

The origin of the phrase likely comes from using the thumb as a quick measuring tool (about an inch wide)

“As a rule of thumb, if pasta sticks to the wall, it’s done cooking.”

by soph2018392 September 8, 2025

Sass Thumb

Sass thumb: a electronic response by only a single thumbs up.

When someone is annoyed at the message and replies with a single thumbs up emoji.

Steph: well I'm talking to my ex boyfriend
Dak: 'replies with a sass thumb'
Steph: why did you just reply with a thumb reaction?
Dak: (2 hours later) that was sass thumb

by Zenmang December 9, 2020

Thumbness

A Person who is very uneducated and stupid.

Alex is full of Thumbness!

by skellytoooooon November 22, 2021

Two Thumbs Up

You love to be caringly held by large muscular men.

Michael and Jacob held two thumbs up in the picture.
They must love large muscular men.

by queerbungeefrog October 16, 2022

Low set thumbs

More people listen to people with low set thumbs, because they are considered more courageous and give compliments to females.

Guy- I wanted to keep my thumbs low a little bit longer, but I didnt feel like being brave or complimentary today.
Guy with low set thumbs- You lazy fucking coward piece of shit, lower your thumbs.

by Solid Mantis September 7, 2020

Kentucky thumb

A sex position where the partner male or female forces there thumb into the other persons anal cavity

I used the Kentucky thumb on my wife last night

by Pootis bird 757 November 20, 2021

Brown Thumbs

A recently formed yet very successful gang based out of Jensen Beach, Florida. With branches spreading as far as Orlando. The gang consist of many key members such as: Thumb Master Poo, Squirts, Big Dump, and Smelly Mike. Also there is rumor of the gang releasing a new album called 'Under My Thumb' with a potential hit single called 'We Just Thumb'n'. Ways to identify a Brown Thumbs member is a BT located on their neck as well as their thumb tattooed brown.

Yo, watch out for them brown thumbs. They'll shit on you.

by Thumb Master Poo February 15, 2015