ninja suprise 

when fucking a girl doggystyle, right before you are about to cum, give her a charlie horse up the ass. Swiftly move at ninjaspeed in front of her and slap her with your extremely sharp penis while you cum on her face leaving a shuriken shaped mark on her face. Proceed to leave the room QUICKLY by setting off smoke bombs and blending in with the enviroment.

Dude, I made that bitch bleed with an ninja suprise last night

ninja suprise by stteeeeeeeel December 28, 2007

Surprise Ninja Attack 

MUST BE DONE WITH LIGHTS OFF! While the male is having sex with the female in the doggy style position, he pulls out and inserts a dildo, so the women is non the wiser that the man has pulled out. The man continues to pleasure her and suddenly turns the lights on, yells "SURPRISE NINJA ATTACK!", and punches the female in the face. Then turns the lights back off.

1)"Bro, remember molly?"
2)"yea...?"
1)"Bro, I totally surprise ninja attacked her last night"
2)"Nice."

Surprise Ninja Attack by hubbabubbamax11 October 31, 2011

Surprise Sex Ninja 

A hero for the new world, he brings about peace through the ancient art of Surprise Sex. His true identity remains a secret.

Oh My God, that guy was just attacked by the Surprise Sex Ninja.

Surprise Sex Ninja by Innocent Bystander September 11, 2004

Surprise Sex Ninja 

Some fool with a t-shirt on his head, runs around and violates people (usually men).

Random Person 1: Cool look, a Ninja costume.
Random Person 2: That's the Surprise Sex Ninja.
Random Person 1: Why is he dry humping that guy's ass?

Surprise Sex Ninja by Lacrox September 18, 2004