Used to express the complexity and badassness. When something involves Pirates and Ninjas it's often too badass for the normal brain to comprehend. Therefore we must either dumb it down or flick off the person who doesn't comprehend the ghettoness of a pirate and ninja expression.
Student 1: Our teachers such a fucking twat why can't we add an explosion to our spanish project?
Student 2: Guess she's anti pirates and ninjas...

Badass 1: I hooked up with like seven fucking girls...
Badass 2: Pirates and Ninjas!
Dumbass 1: Science is fun!
*Beat up noises
by bedroomhijinks April 29, 2009
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A popular fight between two entirely different groups. Based on two different internet subcultures, Pirates and Ninjas, as two very different stereotypes battling out to death. May sometimes have robots, cowbows, or ghosts added to it. The phrase is also used as Ninjas vs Pirates.
One Piece Nerd: Pirates would totally win in a battle between Pirates vs Ninjas!

Naruto Nerd: No! Ninjas always win!
by SuperCowManTypePerson September 27, 2006
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A completely pointless and useless arguement that came from nowhere and is going nowhere. It has no relevence to the modern world or science, but people constantly fight over whether the Pirate or the Ninja is superior.
Person 1: Hey, man. Pirate versus Ninja?

Person 2: Uh... Ninja?

Person 1: WHAT? You're a ninja?

Person 2: All right, all right. I'm a pirate.

Person 1: WHAT? You're a pirate?
by What are you? May 11, 2006
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one who is a pirate, a gangsta, AND ninja, all in one.
originally formed by Pirate Kelsey & Pirate Laura when they had a fight and Pirate laura joined with the ninjas - therefor becoming Ninja Laura.
peter piper couldn't choose, so he became a gangsta.
then they all became friends again and formed the Pirate Gangsta Ninjas.

yeah, bitch.
Pirate Kelsey: i hate you! you cant be a pirate anymore!!Pirate Laura: i hate you too!, FINE!
*pirate laura becomes ninja laura*
Ninja laura: yeah bitch now i'm a ninja!!
*peter piper becomes gangsta*

-- some time later --

Pirate Kelsey: can we be friends again?
Ninja laura: YES!!
peter piper: YAY!!!!!

*they form the pirate gangsta ninja team*
by Pirate Lauraa August 18, 2006
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an online "war" typically on facebook. an application which you pick a side, and recruit as needed. most likely used by faggs.
Joe- "hey bob!"
Bob- "hey joe!"
Joe- "are you ready for the pirates vs. ninjas party at toms house on saturday night?!"
Bob- "yeah! im so excited, can't wait to bring out the Guitar Hero!!"
Joe- "i'm actually more excited for the touch football..."
by K.T. Danske November 14, 2007
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The unholy union between a pirate and a ninja. Pirates and ninjas are widely known to be mortal enemies and are locked in eternal oppisition to each other.

Pirate-ninjas rarely exist in nature because they have extremely short half-lives; upon their creation they rapidly decay in a violent burst of short-wave radiation, heat, shurikens, and parrot feathers.
Pirates vs. ninjas - that ages-old question. Who would win?

The pirate-ninjas, of course!
by Zeda December 7, 2005
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