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underbugger 

A person or annoyance that gets under ones skin and bugs them.
That squeaky door is a real underbugger. I think that new girl is an underbugger, she wont shut up.
underbugger by Christopher Evans August 2, 2008

Underexaggerate

1. To not exaggerate something that is too epic to be stated as simply as what it is in reality

2. To not exaggerate enough sarcastically (used commonly in fratire )
1. Awesome guy: Maddox is the bomb! \m/
More Awesome guy: Don't underexaggerate man!
Emo guy: I'll cut my wrists

2. Maddox: Celine Dion is an over-paid, over-cafeinated, botoxed bitch incapable of singing to humans.
Another awesome guy: Don't underexaggerate

underfag 

People in the Undertale fandom. They tend to be made fun of for being butthurt and cringe-worthy. Among other things, they are also annoying.
Hunter: Undertale sucks.

Underfag: Hey!! Undertale is good the fandom just sucks but Undertale is good and has good ships lol XDD!! Everyone has their own opinion!
Hunter: Then let me share mine.

Underfag: You're just being stupid let me have my own opinion!

Preston: They took the bait.
underfag by IgnitingInsanity May 26, 2016

underbreastimate 

to underestimate the size and/or weight of ones breasts.
be careful not to underbreastimate a women's tits; they are known to suffocate small animals and children!
underbreastimate by Matt Huff October 6, 2011

Underage Drinking 

1. Something that is punishable only in the U.S.

2. Something that 18, 19, and 20 year olds can be charged with in the U.S. due to their fascist drinking laws.

3. Something they don't allow 18, 19, and 20 year old American soldiers to do before they come home from Iraq in pieces with only an American flag handed to their family for comfort.
(in the U.S.) You are a month away from your 21st birthday and are drinking a beer! Thats underage drinking!

(everywhere else) Hahahaha look at that stupid drunk 15 year old!
Underage Drinking by MacDAS January 12, 2007

People Against Underage Driving In Reverse

People Against Underage Driving in Reverse, or P.A.U.D.I.R. for short, was formed on January 10th, 2007 after an accident in a residential driveway caused thousands of dollars in damage to a vehicle. The driver not named and under the legal driving age, put a truck in reverse and crashed.

The main mission of the P.A.U.D.I.R is to fight to keep residential streets, highways, and driveways safe from underage driving in reverse....
Oh Shit, People Against Underage Driving In Reverse are going to hunt that bitch down.
More from Urban Dictionary
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
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
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

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
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
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