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

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

Ninjanuity 

An idea, invention or action that surpasses ingenuity in a sneaky way.

Now that's what i call ninjanuity!

What a ninjenuous idea!

Ninjanuity by Joey Shithouse March 2, 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

Ninjarito 

1) -verb
to take the last item left from somebody that is typically saved until the end because it is the best or most appetizing. Usually, this is most likely being the best chip in the bag, best cookie, juiciest bite of a sandwich, last sip of a drink, etc., but can be anything that is saved for the last

2) -noun
name for a person that commits the act above

Justin: "This last Dorito is going to be so, damn good."

*Anthony grabs the bag and eats the chip*

Mike: "SWOOP!"

Justin: "You ninjarito basterd!"

Mike: "You just got ninjaritoed!"

Ninjarito by lilkobes08 July 29, 2009

Ninjashyper 

A very unfortunate victim of ligma.

Guys, didn't ninja (ninjashyper) die from ligma?

Ninjashyper by PT118 September 8, 2018

Ninjanuity 

to react at a certian point in time where you would not be able to do something but only for that point and time, acrobatic like mind wise or even being sneaky

barbra was coming out of the kitchen with 2 plates in her hand as she started to fall derek grabed one of the plates and her with out dropping anything on the floor, and looking highly dramatic. dam derek that was Ninjanuity there

Ninjanuity by Derek Post July 3, 2007