Skip to main content
Urban Dictionary Merch
Your favorite words on things you can wear, drink from, read, or give to a friend.
The Urban Dictionary Store sells gifts you’ll have to explain.

greninja 

The swaggiest motherfucking Pokémon ever. Seriously. This thing is a ninja frog. Do you think I'm lying? Just to make it better, this thing makes shurikens out of WATER. If you are gonna play pokemon, consider using Greninja. He shits on every other Pokémon. Oh yeah and also his shiny form is black and should always be nicknamed 'Snoop Frogg'.
Dude: Let's battle!
Other dude: I'm gonna use Greninja.
Dude: You win.
greninja by jacknewts December 23, 2014

Green_Ninja 

A Ninja of amazing skill and unimaginable beauty.
Green_Ninja is totally hot.
Green_Ninja by jsbnfjk8eayr January 9, 2008

Greninja 

A ninja frog pokemon who is the strongest water pokemon who is the only one that can use a sword precisely. This pokemon is basically a zanpakuto to a soul reaper, who will adapt to its owner. It has been proven that it will find its suitable owner right away as a Froakie.
Trainer Mordecai Maple (aka Shinji Harakawa): My Greninja has his own sword. *Mordecai's Greninja draws katana*
Grandpa Evan Maple (aka Minoru Harakawa): My Greninja has his matoi^. *Evan's Greninja shoots water bullets from matoi*
Ash's Greninja: I have my own ninja set. *throws water kunais*

^Matoi is an Edo Japan firefighting flag
Greninja by Greghef September 2, 2017

the green ninja 

abilities include;
green
1:whats his power
wu: greeeeeeeeeeeeeeeeen
the green ninja
the green ninja by JaiRed801 October 30, 2023

green ninja 

n. 1. A moron; one lacking the necessary cerebral capacity to formulate coherent thought.
2. A witless boob.
I can't believe he said that. What a green ninja.
green ninja by Sendark April 25, 2005

green ninja 

1)An idiot of unimaginable stupidity.

2)A complete retard.

3)More likely then not, a wannabe asian.
green ninja by Squidi.net/forum April 25, 2005
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
Load more