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The act of tieing a black t-shirt around your head and pretending to be a ninja hiding behind walls from cars and climbing on buildings.
Im going to ninja the village and steal a prize from (insert name here)garden
ninjaring by Daniel Read June 5, 2005

Ninjarific 

The word to say when some thing awsome happends.
Did You see the amazing TD last night? Yea it was ninjarific
Ninjarific by The awsome offspring September 29, 2009

ninjarogie

island royale BEAST(A GOAT) A STAR. IN REAL LIFE HE IS A FOOTBALL GOD. WHEN HE PLAYED AT DEE BOYS IN HIS FIRST SEASON HE SCORED 13 GOALS (B league) . NEXT SEASON HE SCORED 17 GOALS(C league) AND NAMED PLAYER OF THE YEAR. BREAKING EVERY DEE BOY RECORD EVEN BEING THE FAST DEE BOY PLAYER! till the club folded and he ended up in a new team and has been struggling to go back to prime season don't know if he will ever get his form back ;(.
Your just like ninjarogie
ninjarogie by footballfanboylololol November 24, 2020
Displaying the abilities or likeness of the ninja.
Last night, no one knew we were present, which was in large part due to the fact that we were ninjing in the shadows.
Ninjing by Nine Lives Co July 18, 2018

ninjariffic 

You are so full of skills that not even the most ninjaest ninja master could ever kick your ninjariffic ass.
Dude, I'm ninjariffic. End.
ninjariffic by Chris BS September 10, 2008

Ningaling 

Slang for when you say you smell like my Nans toes
Your a ningaling bruv famalam
Ningaling by Famyyyyyyy bruv May 1, 2020
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
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