Ninja bounce 

To leave a room of people without saying goodbye. To leave unnoticed, like a ninja.

I was so tired at the party last night, I totally ninja bounced.

Ninja bounce by WordsImakeup33 September 4, 2015

ninja mouse 

A term to describe a person who has the ability to sneak out of tight situations requiring the utmost delicacy without a squeak.

Man! That chick slid out of my bed like a ninja mouse.

ninja mouse by BigPansy April 19, 2016

Ninja Ad 

An advertisement that appears out of nowhere, usually containing some sort of virus and/or clickbait.

"Aw shit, I was watching porn last night and a fucking ninja ad came up and I accidentally clicked it, and now my computer's got a virus."

Ninja Ad by Tumbleflop April 19, 2018

Ninja's Ligma 

Its when you watch his stream once. It kills you slowly. One tried to get people to do the floss and nobody cared and done it.

Yo man, why would you watch Ninja? Now you have Ninja's Ligma it was nice knowing you man.

Ninja's Ligma by Dashie tribe May 8, 2019

Ninja Face 

The art of using face unlock on another person's smartphone without their knowledge. Usually performed by a child from some sneaky angle while distracting the parent with other matters.

She keeps using Ninja Face on me to watch that stupid YouTube channel

Ninja Face by PatTheChat June 8, 2019

Ninja Brian 

the only ninja as far as I know in the band NinjaSexParty

Goddamn Ninja Brian you killed em all

Ninja Brian by darkclaw wolfgod February 20, 2022

ninja afk 

When a person online goes afk without warning or provocation. Usually to the utter dispair of whoever he/she is interacting with online (note screams of frustration) and often frequently.

"Omgoogle dude, Charles went ninja afk again."

ninja afk by Matrix_Gymnast August 7, 2006