Sneaky ninja 

When a guy has another guy insert into his girl making her think that it is him, while he quietly slips out the door to wave at her thought the window outside

She was so confused after i pulled the sneaky ninja on her last night

Sneaky ninja by Joe Randall June 11, 2008

ninja attack flap jack

way of grooming a dog or sexual position. Dog: fold ears over head so they touch and put a ninja mask on him.

Sex: jump from top of pancakes and land perpendicularly on top of sexual partner. Also wearing a ninja mask.

"Here at west minstah we see Spuds with the "Ninja Attack Flap Jack."

"Baby, finish me! Do the Ninja Attack Flap Jack!"

ninja attack flap jack by bill from ultimate fakebook February 18, 2004

Forum Ninja 

One of the low-lifes who monitor and manage the pitiable and pathetic bungie.net forums. These poseurs consider themselves ninjas for some unknown reason. They believe they have the ultimate power like in "Naruto" and are "1337 H4x025", when in actuality the are morbidly obese geeks who surf the "interweb" in their mother's basements. Forum Ninja's are pathetic excuses for human beings and need to be taught a lesson by real ninja's and deserve a shuriken to the juggular.

Just go to Bungie.net and get banned, whoever bans you is a forum ninja (pathetic moderator who thinks they are "bad ass".

Forum Ninja by Icanhazreconz October 8, 2008

ninja shnoof 

When a ninja hides in your pajamas and right when you're about to go to sleep he thrusts his sword through you.

Sebastian: I'm pretty tired, good thing I already have my jammies on.
Thad: Did you just call your pajamas jammies?
Sebastian: Uhhh.......I can ex-
Hidden Ninja: shnoof!
Sebastian: *dead*
Thad: Holy shit! a ninja shnoof!

ninja shnoof by HELLMANNSstain January 11, 2009

ninja monkey 

Masturbating in a public place

dude i was ninja monkeying in the mall bathroom last week.

ninja monkey by ralphie parker May 15, 2008

Ninja Sanchez 

THIS IS WHEN YOU JUST FINISHED TAKING A SHIT, BEFORE WIPING, YOU RUN YOUR INDEX FINGER BETWEEN YOUR ASS, SNEAK UP ON AN UNSUSPECTING VICTIM FROM BEHIND (LIKE A NINJA) GRAB HIS/HER HEAD AND AND RUN YOUR SHIT STAIND FINGER UNDER THE NOSE IN A TYPICAL NINJA THROAT CUT MOTION.

FOR BEST RESULTS BEFORE YOU RUN YOUR FINGER IN THE THROAT CUTTING MOTION WHISPER SOFTLY,"ninja sanchez"

Ninja Sanchez by ManBearPig05 April 2, 2010

ninja wasp 

a large all black wasp that apears from thin air when it's name is spoken and exhibits very aggresive behavior.

hey you guys don't go out side the ninja wasp just chased me down the block... sorry tommy it got your little brother , he's gone.

ninja wasp by bird from three March 20, 2011