Ninja Ass
An ass that you cannot see. According to the person with this ass, it's apparently there, but not visible to the naked eye. This is just an excuse for a woman with a really flat ass.
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Ninja Ass Blast
Near the end of intercourse, the man pulls his penis out of the vagina and slips it into the girls ass and unloads semen into her rectum before she realizes what just happened.
Ninja Ass Blast by va jay jay king April 4, 2010
Related Words
bird ass ninja
Leon is a real bird ass ninja, he gets upset when he is not svelte.
Leon likes birds, so he must be a bird ass ninja.
Leon likes birds, so he must be a bird ass ninja.
bird ass ninja by DrJK December 21, 2010
ass ninja
ass ninja
A mythical being who exists to give people wedgies. As with the Tooth Fairy, Santa Claus and the Easter Bunny, the Ass Ninja visits all the little boys and girls in order to bunch their underwear at the worst possible times.
"Dude I totally just got visited by the Ass Ninja! Cover me while I pick my underwear out of my butt."
ass ninja by Dark_Angel August 25, 2012
Crazy ass ninja
a rather crazy assed ninja, such as yoda, or chuck norris (also note chuck norris kills most failed crazy assed ninjas)
Crazy ass ninja by Crazy assed ninja January 29, 2009
More from Urban Dictionary
Boffin
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.
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.
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.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Ajumma
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
Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026