Ninja 

A Ninja is someone who leaves a party or pub/club without telling their friends, all stealth-like (usually because they're tired or drunk and don't want to cop flak for leaving early). This practice can become a common prank between friends, sometimes blowing up into an all-out "Ninja War".

Friend 1: Where'd Beamers go?
Friend 2: Umm, she told me she was going to the bar for another drink. Wait... That was half an hour ago...
Friend 1: Unbelievable, she's done a Ninja again.
Friend 2: That's it, Ninja War declared.

Ninja by Beamers202 July 23, 2013

Ninja Like 

The act of logging onto a social networking site and rapidly liking a status/post before immediately leaving the website.

Not to be confused with Ninja-like

"Dude, she's not online. She just ninja liked your status, that's all."

Ninja Like by Carnifeaux November 5, 2013

ninja handshake 

A handshake involving many complex movements, but no one ever sees it because, as mentioned in the title, it is considered to be ninja-like, therefore cannot be seen.

Did you see their handshake?!

Of course not; it's a ninja handshake.

ninja handshake by mads1103 November 29, 2013

ninjagram 

Someone with an Instagram account who posts no photos. Rather, they have the account so they can follow others, and stealthily stalk their posts, without contributing any of their own.

"I didn't know Steve had Instagram?"

"Yeah, but its totally a ninjagram account. He follows 100 or so people, but hasn't made a single post himself."

ninjagram by whatevertrevortrevor January 21, 2014

ninja uptuck 

The act of pulling ones erected penis up behind their pants button in attempt to hide it.

My teacher gave me a raging hard on while talking to me so I had to do a ninja uptuck.

ninja uptuck by BobDylansSkidMarks January 31, 2014

ninja load 

A portion of ejaculate that is discovered after due diligence is made to clean up after ones self. The location of which is usually surprising or unexpected.

"I just discovered a ninja load under the bill of my hat! I have been walking around unaware for an hour."

ninja load by Jastro February 7, 2014

ninja ops 

When you stealthily sneak-into your girlfriend's home after her kids have gone to sleep, so you can get some.

Man, I had to do some Ninja Ops at Michelle's house last night just so I could get some.

ninja ops by Ojete April 27, 2014