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undernight

The opposite of overnight. If overnight is defined as the period from day through night to the next day, undernight is defined as moving from night through day into the next night.

Essentially means "daytime."

Synonymous with overday, if such a word existed.
"I'm staying at a friend's place overnight."

"Oh yeah? I'll be there undernight today, I might see you there before I leave."

"Word."
undernight by Daem0n October 26, 2011
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Hop on Under Night

Slang for lesbian sex, commonly used by women in the Fighting Games Community (FGC) as it's a reference to the Under Night In-Birth games.
-Hey babe, wanna hop on Under Night in the evening?
-Sure thing, wanted to ask the same.
Hop on Under Night by Danna330 July 22, 2021

underlight

Underlight was a fantasy massively multiplayer online role-playing game (MMORPG) by Lyra Studio's

Underlight focused on character development and interaction rather than combat or items. Underlight's setting was a shared dream state. Gameplay revolved around the interactions of numerous guilds, each with a different take on the dream-space they inhabit

Underlight shut down November 2006.
Anyone remember Underlight? No? Pity )=
underlight by WalkingDreamer July 10, 2009

underlight

a game run by a biased team of gm's who don't believe in fair play.
a graphical real-time cyber-sex world.
a crock of shit.
rpg player 1: hey, what is that game you are playing there that looks to be entirely biased as those players that the gm's favour are getting rewarded for cheating and being assholes? it looks like a crock of shit.
rpg player 2: its called underlight
underlight by <3 dol May 3, 2005

Underweight 

A term which is supposed to refer to a body mass index of less than 18.5 or simply being in a healthy weight range but is overused to categorize what seems like thin people in general.

Ridiculous really, just because someone weighs a couple pounds under the fixed ideal number and is clearly healthy they seem to be branded with a word that makes them sound unhealthily thin.

Meanwhile if someone weighs anything OVER the fixed ideal weight they are never called overweight until they actually reach the BMI 25 mark. In fact, women are complimented and praised for having 'great curves' while if they weigh anything below that optical number they are considered 'fit for eating disorder diagnosis'.
Jim: "Well i guess I'm about 5'8 and I weigh.....150lbs?"

Doctor: "Sweet Jesus. Ideal weight for that height is 155lbs! You are clinically underweight. God have mercy on you Jim. I advise a high calorie diet and intense workout regime. You're body mass index is only 22.8 for heavens sake, build some self contr-"

Jim: "But I -"

Doctor: "Follow the obesity Jim. Being slim and healthy just isn't acceptable for any man Jim. A 33 inch waist is.....unmanly in my opinion. Its just not the American way. EAT! EAT! EAT!"

Jim: "Isn't obesity unhealthy?"

Doctor: "Oh so you're offending fat people now? Get out of my office, you....uh ...perfectly healthy yet underweight twig!".

Undernigger 

A person or being that is considered less than a nigger
Man 1: Did you see that poor ass bitch sitting under that bridge?!"

Man 2: "Yeah what an undernigger."
Undernigger by Mosrs August 19, 2012

Undersight 

To over look a small detail, to miss a nominal item. To forget to do something very small.
Sorry Sir, that was an undersight on my part, to not add that item onto the invoice.
Undersight by Podscatter February 9, 2009
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The phenomenon where adults salivate at children's toys
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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.
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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
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Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
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korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
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Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
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