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the unbearable lightness of genius 

the unbearable lightness of genius is an affliction that affects only one person in the entire population of earth and this person is a guy named Seán (who is also affected by the unbearable lightness of awesomeness too but that's for another day)
when Seán woke that morning he was suddenly overcome by the unbearable lightness of genius...he knew that Wordle didn't stand a chance that day. unrelated... he also looked super hot.

Boots of Lightness 

An item from the game RuneScape, that lower your weight in kg by 3, Making you regain run energy faster, and thus running for a longer time.
When I have my Boots of Lightness on I feel like I could outrun a black man!
Boots of Lightness by Newton37888 September 29, 2008

Legitness 

When your friend nails a sweet scooter trick, it is called legitness
Legitness by Phil0sopher June 4, 2015

legitness 

When something is so legit (real, authentic) that the only word that could possibly describe it is "legitness".
"yo dats only $20 a gram"

"for realz??? I gotchu bro, dats straight legitness right there, you the man"
legitness by Homeless Chicken August 27, 2017

Lighters Thumb

A callus or blister or indentation formed from using a Bic lighter too frequently. Caused by pushing down on the spark wheel, or the heat from the actual flame heating the metal or bad handling of a lighter.
My Lighters Thumb hurts like hell!
Look, he must smoke a-lot, he has Lighters Thumb!
Lighters Thumb by SummerBoi?! January 1, 2018

Litness test 

Spin off from "litmus test".
The test that measures your "litness" level
Douchebag #1: Yo, Kyle wants to hang out with us, what should I say?

Douchebag #2: Brah hell to the nah, he ain't pass the litness test. He wack.
Litness test by ReyesXS April 23, 2017
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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