Ninja Sprinkler 

When a Black man falls asleep with an erection, has a wet dream and shoots his load to the ceiling

Antwon pulled out a Ninja Sprinkler last night in our dorm room.

Ninja Sprinkler by Floppy jack October 21, 2011

ninja-text

A text message that reaches your phone without making a noise, vibrating, or indicating in any way that you have received said text. The ninja-textee is shocked to find, minutes later, that there is a text in their inbox.

Guy: "Hello? You there? I've texted you like three times!"

Girl: "Oh fuck, sorry I didn't see the message!"

Guy: "Must've been a ninja-text!"

ninja-text by TextMessageNinja November 27, 2011

Ninja Nonsense 

noun.
1. The kind of nonsense that jumps out at you when you're not expecting it. Usually from a friend's mouth.
2. Something that shouldn't be funny, but is.
3. Everything that comes out of Blue's mouth.

Blue: I'm going to boil some words and see what happens.
me: What, like alphabet soup?
Blue: Yeah.
me: Maybe you'll get Shakespeare.
Blue: That is some superb Ninja Nonsense right there!

"Nonsense is okay, but sensical nonsense is an extreme form of nonsense. Like Ninja Nonsense!" ~Blueberry

Suicidal sense should be a synonym for Ninja Nonsense. Sense that just kills itself.

Ninja Nonsense by Cassiopia&Blue November 28, 2011

Ninja Writer 

Someone who takes your writing ideas and publishes them before you have a chance to.

"You get that idea on screenplay yet?"

"nah, dang ninja writer already released a movie on it."

Ninja Writer by NCrash December 17, 2011

Ninja-Tweeting

The art of mysteriously and secretively tweeting multiple times whilst being fully engaged in a two-way conversation.

Bob: Bro, we've literally been talking this entire time and you don't even have your phone near you. How did you manage to tweet 15 times in the last 3 minutes?!

Mox: Two words my friend: Ninja-Tweeting.

Ninja-Tweeting by maxamillianimus January 26, 2012

Ninja Attack 

1. when someone comes completely out of nowhere during a race or any other event.

2. fighting a single person or a group of people like ninja

"That guy was in last place for the race but he just Ninja Attacked us."

Ninja Attack by y.cole June 15, 2012

Ninja Callous

An inexplicable, noticeable, callous on any little toe on one's foot which can only seem to be explained by one doing ninja like acts.

You sit and rest one foot on the table. Roommate notices an ugly yellow scab looking thing on the middle toe of your foot.

(Roommate): "Dude! How did you get that callous!?"
(You): "Wtf!? I don't know! It seems like some kind of ninja callous!"

Knowing that you weren't up to any ninja-like activities, you decide to pick at it, then realize its a piece of dead leaf.

Ninja Callous by Koo guy August 13, 2012