Ninja-hump 

When one comes up behind someone and clandestinely humps them for a short period of time, and disappears before the humpee knows what has happened... Like a ninja...

Oh my God! At the French Creek trip, Dijon Berlin came up behind Jane Smith while she was dancing and ninja-humped the shit out of her.

Ninja-hump by IO Echo August 4, 2009

ninja hamster 

Any of a subfamily (Cricetinae) of small Old World rodents trained in ancient Japanese martial arts and employed especially for espionage and assassinations while having very large cheek pouches.

Holy crap! My cat just got jumped by a ninja hamster!

ninja hamster by Anonymous November 2, 2003

ninja hug 

a hug that you randomly give someone really fast like a ninja (: to show your love

I gave aaron my bfff a ninja hug

ninja hug by love is my weapon<3 June 21, 2009

Ninja Hooker 

A mythical hero who protects other hookers from abusive and or cheap clients. Usually uses penis deforming ninja weapons.

The married, sucessful, CEO didn't want to pay Bubbles, so she called upon a ninja hooker, who then mutilated the poor soul with her medieval weaponary.

Ninja Hooker by El Guero Canijo May 20, 2011

Ninja Hands 

The act of a girl blocking any advance of guy trying to remove her undergarments in the dark. Typically consists of strategic chops around the waste area while she is kissing. Always done in the dark with pinpoint accuracy no matter how intoxicated she may be.

Erin was giving Matt Ninja Hands all night long.

Ninja Hands by DJ DNA December 14, 2010

Ninja has Ligma

Ninja has Ligma

Ninja has Ligma

Ninja has Ligma by Bluefirework_17 April 7, 2019

Ninja Heart Attack

In any video game:
When death occurs for an unknown reason.
Nobody knows how it happened.
Nobody knows why it happened.
Nobody knows WTF happened.

But, it's fucking hilarious.

Guy 1: "WTF, did Jesus just snipe me?"
Guy 2: "Bro, I have no clue you just fainted."
Guy 1: "Fucking Ninja Heart Attack, damn it."

Ninja Heart Attack by WolfRhino March 1, 2008