ninjatar 

"what appears to be a guitar except that it can only be played by trained assassins. It is so electrifyingly rockin' that if you aren't a ninja, your head will explode."-Ask A Ninja.

Or

what you call a person that plays guitar so awesomely rockin' that they have to be a ninja to play it.

CJ was jammin' out on his ninjatar. he must be a ninja!

ninjatar by Secret Justin June 24, 2007

Ninjatard 

Retarded kids whom consider themselves intelligent because of their Counter Blox inventory. You can usually find them lurking in the Ninja's Trade server on discord, prowling the text channels in search of unsuspecting prey to shark. They tend to be vile and vocal creatures, with their one liners being, "WhAt AbOuT dEmAnD" and "CaStLeRs AnD aImEr AbUsE tOo MuCh".

Enzo tried to frame Aimer for alt trading with fabricated DMs. Kinda a fucking Ninjatard.

Ninjatard by solxr June 11, 2019

ninjawarrior1245 

An idiot online that believes his opinion is better/higher up than everybody else’s, if you disagree with this fully grown man he will throw a small hissy fit, embarrass himself and then block you. He also hates on new Ninjago all the time but still buys the sets, if he hated it that much he’d stop supporting the show right? Wrong, this guy is nothing short of braindead and should be left alone to be an idiot

"Come on man, don't be a ninjawarrior1245!"

ninjawarrior1245 by Crusty783 July 17, 2020

NinjaHarrisonMC 

Very famous youtuber that has a potential of making millions. He made a video about him getting exposed and will have over 5k subs by December 2094.

Fan 1: Yo did you see Ninjaharrisonmc's new video.
Fan 2: Yea man he got exposed by C O N N E R.

NinjaHarrisonMC by Judlig Wan Beetjoven October 20, 2018

Ninjatastic 

So Fantastic, it's Ninja worthy.

That flip was Ninjatastic!

Ninjatastic by The Ninjirate April 9, 2007

Ninjaturtling 

To partake in ninja training while under the influence of LSD.

"Hey guys wanna drop some acid and go ninjaturtling in the desert tonight?" "I ninjaturtled so hard yesterday!"

Ninjaturtling by haileyleeleelee June 25, 2015

NinjaStar 

A 14-year-old short squeaker that claims he's not a short squeaker and he can't take a joke no matter what you joke about and also he gets mad at everything.

he

Oh, shit guys it's a ninjastar run!! Before he blows out our ear drums.

NinjaStar by AnonymousOnUD August 5, 2017