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America's greatest mistake 

The 45th President of the United States of America.
The 45th, in my humble opinion, will be America's greatest mistake.
Mistake by s22jjames November 1, 2018

Mustakrakish

One of the main characters in Metalocalypse episode 4: Dethtroll.
A troll from the Finnish Necronomicon that dethklok awakens during an apology to Finland that turned into a concert. The act was unintentional, as they had found the song in an old Finnish book. The band was declaring the song the new Finnish national anthem. As the story unfolds, Mustakrakish can not be stopped by normal means, so Dethklok proceeds to write the first "soft death-metal" song ever to be written using medieval acoustic instruments. Mustakrakish is dozing off, when Murderface's "dethphone" rings. Mustakrakish wakes up, destroys the instruments, and all hope is lost. However, thanks to Murderface's short temper, he throws the phone in Mustakrakish's mouth, as he can not hear the person he is talking to and his call is lost. The pain from the spikes on the dethphone is too much for Mustakrakish, and he begins tearing out his own innards to get the device out of his system. He then proceeds to blow up, causing millions of dollars worth of damage to Finland.
Mustakrakish is t3h 4w350m3!!1!1!
Mustakrakish by sk0t September 30, 2006

Achy Breaky Bad Mistaky 

A 90s guy still rockin' a mullet. The high school quarterback from 1993 that just can't let the past go. Hasnt had his hair above his shoulders since junior high.
Holy crap I saw Brad at the grocery store and he was buying Combos and Mountain Dew and still had the mullett!! Talk about trapped in the 90s! What an Achy Breaky Bad Mistaky!

French Mistake

When an otherwise straight male is persuaded to, or on a whim in the heat of the moment, engages in a homosexual act of which he later regrets and is ashamed.
Alluded to in the musical number of the same name in Mel Brooks' film "Blazing Saddles".
Having shared the intamacy of a small tent for so long, in the stress of jungle combat, Pierre and Gustav came close to making the French Mistake on many a steamy night.
French Mistake by Mo T Juste September 19, 2008

Great Mistakes 

Nickname for the Navy's Recruit Training Command (boot camp) in Great Lakes, IL. So named for the regret felt by some recruits wondering just what they got themselves into.
I can't wait to see my wife when I finish up at Great Mistakes.
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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