ninjaing 

basically doing everything a ninja (killing sneaking around taking out pirates the usual) does without being seen or heard

d00d I was having so much fun ninjaing yesterday I took out three guards with no problems

ninjaing by the true ninja August 29, 2006

Ninjaing 

The Act Of Shop Lifting Or Doing Something Very Ninja Like.

Guy1 "hey what you up to?"
Guy2 "not much just going ninjaing"
Guy1 "oh ok cool could u get me a mars bar?"

Ninjaing by ParasiticVampyric March 3, 2009

ninjaing 

Sneaking out of a party/bar without saying goodbye, unnoticed, like a ninja.

"Hey, where'd you go last night?"
"Aw man, I was starting to feel the shots so I had to ninja"

"Where'd your friend go?"
"Oh, probs home. She's bad about ninjaing"

ninjaing by kylzzville December 5, 2013

Ninjaing 

To behave (or attempt to behave) in a ninja-esque manner, with agility, skills, subtlety, and stealth.

I was ninjaing my way around the house in the dark because I didn't want to wake the kids.

Ninjaing by KnightSmithJones July 6, 2022

ninjaing, ninja it, or ninjaed

ninjaing- downloading software illegally and bad-ass stealthily because you're that awesome of a cyber ninja, also means you're doing cool ninja stuff BECAUSE YOU'RE A MOTHERFUCKING NINJA!

(to) ninja it- similar to "pirate it" or "pirating it" so see above definition

ninjaed- you've been ninjaed!

Real Life Ninja: (Can't download new video game) Ywaaaaah shaaooohwah! (Throws shuriken at computer screen)
Computer's Response: Ninjaing, ninja it, or ninjaed!
Game downloaded...loading...currently .000001%
Estimated time remaining is 1 Year!
Ninja: AAAAAAAAAAAAAAAAAAAAH Shooooomaw!

Pirate: Yaaaarh! Got me some nice booty.
Ninja: (Holding pirate's internet booty)
Pirate: ...AAAAARRRRGH! I've been ninjaed!

ninjaing, ninja it, or ninjaed by IMJUSTANINJA! June 27, 2011

Ninjing 

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

Name Ninja-ing 

The act of asking how to spell one's name, when, in reality, you forgot their name.

Luke: "Hey Sarah! Whats up?"
Me: "Hey man! Not much, oh dude, I accidentally deleted you off my phone. Can you re-add your contact?"
Third person: Dude! You rock at Name Ninja-ing."

Name Ninja-ing by etuue June 21, 2010