Ninja Ball

The act of farting into one's own hand, then "throwing" it into an unsuspecting target's face.

"Brian threw a ninja ball into Greg's mouth."

by Joe May 27, 2006

Nerf Ninja

The act of someone acting like a complete retard only to destroy his own reputation in attempt to gaining one

kid: Hello folks, i am your nerf ninja

others: wow, what a faggot

by IamPerson1 December 29, 2009

quim-ninja

any male who uses martial arts on a vagina. results may vary

I had no idea Steve was a quim-ninja, until he dragon punched my uterus last night.

by RossBC September 11, 2005

ninjas on fire

A synonym for something so kickass it could only be Halo 2. Stems from a speech by Jason Jones.

"Halo 2 is alot like Halo 1, except it's Halo 1 on fire going 120 miles per hour through a hospital zone chased by helicopters and ninjas. And the ninjas are all on fire too."
-Jason Jones

by Zuka July 14, 2004

Ninja Poop

The act of pooping while having a conversation with someone on the phone

"My poop quickly turned into a ninja poop when my boss called."

by drewh762 October 14, 2011

Ninja wood

The unexpected,unprovoked erection that occurs while in public. Usually characterized as coming out of no where, particularly in the morning (at work or in class)

Scholars maintain that it a
reverberation of morning wood...
similar to an after-shock associated
with earthquakes

Morning wood is to ninja wood as
Earthquake is to after-shock.

This morning, in my math class, I had a mean case of ninja wood that came out of nowhere. (It snuck up on me like a stealthy ninja)

by Chris A. P. February 9, 2007

Nintendo Ninja

A squadron of highly trained individuals hired by Nintendo to take down romhacks, copyrighted and leaked content very quickly.
They're never seen, only heard of.

For a second, you were playing a romhack, you blinked your eyes and now it's gone.
Fatalities including, but not limited to:

AM2R,

Pokémon Uranium,
SMBX,

PM,

every single one of Souljaboy's "consoles",

etc.

Person 1: Aww dude, I was gonna download this awesome romhack, but now it's gone.
Person 2: Oh, it seems the Nintendo Ninjas have done their work swiftly.

by Echmann May 31, 2019