Sex Ninja 

A person who can engage in sexual intercourse or masturbation so stealthily that the people in the adjoining room do not suspect a thing.

Dave: Dude, did your parents cath you and whats-her'face screwing last night?

Ed: No way, man. I'm a sex ninja.

Sex Ninja by Wesker June 11, 2006

sex ninja 

Someone who acts conservative but is secretly really kinky and good in bed.

"I thought John was a super awkward nerdy guy who never gets girls, turns out he's a complete sex ninja!"

sex ninja by THE sex ninja January 5, 2013

Sex Ninja 

Someone who is super sneaky in bed and doesn't get caught or noticed (Unless they want to be).

"I am a super sneaky Sex Ninja. I will sneak into your house, Into your room, Take what I want from you, Leave and you will never know I was there."

Sex Ninja by C00kie Crumbs December 6, 2006

Sex Ninja 

Someone who's sexual prowess is so awesome that they boarder on having mystical powers.

"They pulled a total Sex Ninja move and made me jizz using only their thumb!"

They must have gone to Sex Ninja school 'cause they fucked me balancing on one leg on the edge of the bathtub!"

"That Sex Geek made me cum so many times and in so many ways that their nickname is Sex Ninja."

"Sex Ninjas can make you orgasm anytime, anyplace."

Sex Ninja by ReidAboutSex August 25, 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

Ninja Sex Party 

Ninja Sex Party (NSP) is a band created by Danny Sexbang (Leigh Daniel Avidan) and Ninja Brian (Brian Wecht). They make music that usually involves Danny attempting to hit on women, but ultimately failing. While Danny's character is a self-centered douchebag, he is very nice in person. Brian's character is a murderous Ninja, but in real life he is a theoretical physicist.

Ninja Sex Party is also a part of another band called "Starbomb". Starbomb includes Danny, Brian, and Egoraptor. Starbomb's premise is to make songs about video game characters being put into adult situations.

I love Ninja Sex Party's music!

Ninja Sex Party by Arin's Chins June 25, 2014