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Ninjavitis 

A condition marked by frequently startling people on accident, such as while walking up behind or beside them to say, "Hello." Most accurately described as pervasive accidental sidling.

Ninjavitis most commonly occurs among those who wear wrestling shoes, women with small feet, and the Japanese.
Person 1: (Casually walks up beside Person 2) Hey, man!
Person 2: Dude, you scared the crap outta me! It's like you've got ninjavitis.

See also: sidler, sidle
Ninjavitis by The Cruz October 19, 2010

ninjavidual 

A person who remains very unique as his or her own individual in a very secretive way.
Man, she's such a ninjavidual. Look at the way she silently deals with OCD.

WOW ! His mysterious nature gives him an aura of ninjaviduality !
ninjavidual by Frosty August 16, 2003

Ninjavitus 

A rare disease that gives you the skills of a level 8 ninja master.
Ninjavitus symptoms may include friends and family dying from sudden and uncontrollable karate chops, and the urge to carry ninja stars.
Ninjavitus by Evan Salas March 27, 2007

Ninjavited

Short for "Ninja Invited" (see Also "Ninja Invite")

A term in on-line gaming, especially World of Warcraft. It's the process of inviting someone to join your group (party, raid or guild) without politely asking them first.
"Sorry, Honey, as soon as I logged on I got Ninjavited to the raid"

"We need someone to dps, just ninja-vite someone from LFG"
Ninjavited by Laliho August 7, 2009

ninjafondler

One who has achieved such speed, agility, and dexterity that even a ninja cannot escape his/her grasp
*guy catches a impossible pass*
holy shit did you see that!?
yeah that guys one hell of a ninjafondler
ninjafondler by DakodaXD August 19, 2010

Ninjacide 

The same as suicide but with a ninja instead of a gun, rope, car exhaust...ect.

Purposly picking a fight with a ninja because you have a death wish.
Dan: Hey ninja, what's the matter? wake up on the wrong side of your mother this morning??

<later at Dan's closed casket funeral>
John: So, how did Dan die?
Kate: it was ninjacide...
John: Sweet!
Ninjacide by neversweat May 24, 2006
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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
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