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mysterious nigga 

Nigga who wears hood and does voodoo
mysterious nigga by ts98 April 23, 2014

Mysterious Figure 

The biggest dick in all gaming history.

He's an optional boss in kingdom hearts, birth by sleep. He has 2 lightning energy dagger type weapons and he can cast pretty much all the strongest spells such as meteor, megaflare, death, and all of his melee combos bring you to 1hp almost, he also turns invisible at half health and you can no longer see or lock on to him or see where he's coming from, he can make multiple clones of himself that can all do the same attacks and he has an attack that erases all of your special attacks.

Also if you start doing a moderate amount of damage to him he will either put up a temporary shield that makes any damage heal him or he will stop time, reverse it, teleport behind you, begin an attack, and then unfreeze time again.
"Oh hey its Mysterious figure, maybe i should fight hi-"
*1hp*
*dead*
"What just happened?!"
Mysterious Figure by White Key June 30, 2011

Large Mysterious Fish eats a Duck 

A Youtube video that shows a lake with ducks swimming in it, and then suddenly a skeleton jumps up in front of the camera with the same scream as K-fee and scares the viewer.
Me and my friend watched Large Mysterious Fish eats a Duck and now we can't sleep.

Mysterious Lady Parts 

A term coined by Ricky Bobby (Will Ferrell) in Talladega Nights referring to well, no one knows, thats why they're called MYSTERIOUS lady parts.
"Why is Jenn such a bitch today?"
"I think there's something going on with her mysterious lady parts."

mysterious 

Is someone that no matter what would you do, you won't be able to understand them, or to get straight answers, he is the guy/girl who is friends with everyone, can talk to whom they want, but still shares no secrets, no pain, nothing with someone else than themselfs... he is the guy that walks with his hands in his pockets, looks arround once a while, doesnt talk much, probably smokes, and have more than one talent, but doesnt use it to draw other's attention..
-Did you read that poem? its dark and cheerful.
-Well you can never know what *Name* thinks about he is Mysterious
mysterious by SilverHeart April 27, 2009

mysterious mysteries 

From Invader Zim, Mysterious Mysteries is the show that Dib watches constantly.
Dib: Mysterious Mysteries is on!
Gaz: Why do you have a head?

or

Dib: i finally got pictures of Zim without his disguise, Im sending them to Mysterious Mysteries and then the whole world will know the truth!
More from Urban Dictionary
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
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
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