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The most annoying damn thing for badboyhalo.
bbh: SKEPPY, //UNDO RIGHT NOW
skeppy: types 'slash slash undo'
donation: tilted left magnifying glass tilted right magnifying glass
bbh: AHGH STOP WITH THE DAMN DONATINOS AND THE TROLLIGN
skeppy: but its a good way to pingspoof
bbh: JOIN TS RIGHT NOW
skeppy: what is ts?
bbh: YK WHAT IS TS DAMN
skeppy: oh yeah, isnt it that thingie where it can auto place pinecones for you?
bbh: AGHHH JUST LEAB VE
skeppy: but i havent opened the auto placing pinecone app still
bbh: *bans skeppy*
//undo by Ubahnboy September 15, 2022
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undo is said like un-doh which is a shortening for under cover cops
theres undo's down that street, we should go the other way.
undo by ^N0N December 29, 2012

undo the badness 

A desperate, exhaustive attempt to, by any and all means available, reverse corrupt thinking and/or behavior that results from the persuasive influence of a malevolent, toxic or otherwise destructive agent.
So just when we thought we had salvaged him from the darkness of his peer-group inspired conduct, we were out-done by a fucking Snatch-Chat ambush; let's just hope that we can undo the badness...
undo the badness by YAWA August 5, 2017
A very obscure character character from the Super Mario universe from Mario Paint. Duties include erasing the last figure made and dancing. It's appearance is a tan/brown dog with a thin black box on it's neck.
The undo dog's box could have symbolic meaning.
Undo Dog by Elderly Man December 6, 2005

Undo-Kweef

A word to describe a wigless pimp whom wig has been snatched by all the tea they have consumed in drama.
Our local pimp was undo-kweefed.
Undo-Kweef by TokyoTheBaddest December 4, 2018

Undo Hundo 

A 100 dollar bill that has been stored in someones undergarment, such as a bra or underwear.
Would you believe Sarah had the nerve to pay me back with an undo hundo?
Undo Hundo by Vaginas up July 21, 2016

Undo my sad 

The titular lyric in the song "Undo" by Sanna Nielsen. The lyric in question is often very confusing. Does it mean to be happy? Does it mean to remove all negative feelings? That is an answer lost to time.
Emily: "Undo my sad!"
Fred: "Bro, wtf does that even mean?
Emily: "I have depression.."
Fred: "You don't.
Undo my sad by The Mudpie June 12, 2022
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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