Ninja Duece 

Preparing to do something when you suddenly have to take a dump.

"Man, i was about to play some CoD4 when a ninja duece popped up."

Ninja Duece by Goat41 July 12, 2009

ninja 

someone who is using the perk "ninja", or "ninja pro" in "Call of Duty: Modern Warfare II".

In a free for all

Ninja:

"Ooh I'm gonna sneak up on Erik B Red, and kill his ass...Bam!!!! How you like them apples?!?!?!"

Me(with a heartbeat sensor):

"Damn ninjas!!!!! I'm gonna kill you ninja!!!!"

ninja by Erik-B March 13, 2010

Ninja runner 

Most often used in the running community, it describes a person who likes to run while wearing all black.

The ninja runner darted across the dark road, barely escaping certain death from an oncoming tractor trailer.

Ninja runner by The Logophile May 4, 2010

ninja delete 

To delete a comment, message, or post shortly after entering it, hoping no one will see it.

I really shouldn't have said that, I'm going to ninja delete that post real quick before anyone reads it.

or

Brian totally ninja deleted that comment on my status, so now my reply comment makes no sense.

ninja delete by FairyTayl October 14, 2010

Ninja Love 

1) Delivering or receiving unexpected compassion, kindness or affection.

2) Surprise sex or sexual acts that are welcomed by the recipient.

1) He showed up with flowers today and dropped some serious ninja love on her.

2) She climbed over the arm rest and offered him some hot ninja love right in his truck.

Ninja Love by The H3R3T1C April 20, 2015

NINJADUST 

The art of being able to appear and attack out of thin air like a fart being crop dusted.

It was as calm night, and my buddies in the car got NinjaDusted with the car windows and doors were locked while driving.

NINJADUST by NinjaDustWallee June 12, 2015

ninja cream 

When you sneak up behind someone and cream in them before they know you were there

Damn, I was minding my own business when I look down a realize I had been ninja creamed! The nerve on that guy.

ninja cream by xjax1 January 15, 2018