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

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

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

Weed Thumbs

When you’re higher than giraffe balls and your thumbs stop working.

Urban Dictionary people: this submission took me like 8 minutes to type because my edible gave me weed thumbs and I’m higher than giraffe balls and I hate spelling mistakes

by DrMillerLite August 22, 2022

The ball bum thumb

A type of infection that spreads to the thumb,
From running it up someone's ass, or possibly your own, thumb will swell, bum will swell, kid will cry!!!

Man I cant give Brad cant drive anymore, the ball bum thumb got him again!!!

by Uranus stinks February 7, 2019