Ninja Birthday

Noun: The day one crept into the world. Best calculated by using your birthday minus, 9 months.

Dave: Hey, it's my birthday today!
Logan: But it's August...I thought your birthday was in April?
Dave: Aaahhh yes, this is my ninja birthday.

by ponderingponderer April 8, 2010

The Big Ninja

Is what AIDS or HIV is referred to in a jail or prison.

Inmate A says to inmate B- " Hey watch out for that dude... he's got The Big Ninja.

by The_ Dragon February 13, 2008

the ninja effect

when a big streamer (like ninja) goes to an unmarked area in fortnite and gets good loot so a bunch of 10 year olds go there

damn the ninja effect happened at my favorite spot

by egg thing a ma bobber May 20, 2018

Ninja Test

A tough and difficult challenge that involves personal risk and you need to be skillful to complete it.
Often entails suffering a degree of pain.

The scene: A shear crag with rocks and the sea below.

Dave: Come on Peter lets go scuba diving down there.

Peter: Are you crazy? We'd need mountain gear to climb down plus all the that scuba gear weighs a ton.

Dave: No we don't man, it'd be a true ninja test for us!

by Groove Rider February 19, 2009

Ninja boot

Like camel toe but on a guy. Where you have part of the junk on one side but the rest on the other side.

Hey did you see that guys ninja boot?

Yeah it was a straight up ninja turtle toe

by Pgoats August 13, 2017

Ninja Walk

Walking in a crouched position as if to hide an erection.

The other day I was ninja walking around the grocery store to make people think I had a hard on.

by zbishop May 19, 2010

Milk-Ninja

A fat kid who throws milk at a faggots face because hes always being a bitch

Jesse: Hey antonio threw milk at carlos's face
Hugo :Yeah, hes a fuckkin milk-ninja , and carlos is gay

by Milk-ayla May 26, 2009