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."

Ninja Ball by Joe May 27, 2006

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)

Ninja wood by Chris A. P. February 9, 2007

Ninja Kisses 

A ninja kiss: (n) a kiss in which the two participants are kissing in a group of people, without anyone within the group noticing they are kissing.

Shelby: Did you notice?

Laura: Notice what?!

Shelby: How did you not notice!! Me and Jordon were exchanging ninja kisses all night!!

Laura: Oh wow, you two are good ninja kissers!!

Ninja Kisses by King Muffin February 22, 2009

Ninja Jizz 

The remaining jizm or spunk that eminates, some time later, from ones japs eye after a wank. Even after a good shake and pipe clean.

After a morning wank before work, you clean up and head to work only to find when you go for a piss you have found a whole load of Ninja Jizz.

Ninja Jizz by tehsnrub August 28, 2009

ninja focus 

originated in the late 2000's. place of origin is english. slows down heart rate so that it seams like you are dead

Dale: i thought you were dead!
Brennan: No i was faking i used ninja focus!

ninja focus by conotyui January 16, 2011

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."

Ninja Poop by drewh762 October 14, 2011

ninja puller 

A ninja puller is a strategy for player killers to get other players killed and steal their stuff in MMORGs like World of Warcraft. Is there a MMORG yet like WOW that this is not the best and quickest strategy for character advancement?

Leeroy Jenkins forgot what the pick up key was nor did he know that his strategy would later be called 'ninja puller'.

ninja puller by John L Foster! December 25, 2007