the act of taking two 15 inch black dildos and tieing them together with a string like nunchucks. while shiving one up your ass you then swing the free dildo around and sneak up behind your partner and hit them with it. thus creating a ninja like expirience.
by The Urban Flame February 05, 2011
While a girl is giving you head..right as you cum karate chop her in the back of the head then stick your dick in her nose
Guy 1: Dude this girl was giving me head then i totally did the ninja nosejob on her
Guy 2: Thats fucking gross man...thats messed up
Guy 2: Thats fucking gross man...thats messed up
by sandman142 August 17, 2010
someone who operates a bicycle in dark or low light conditions with no lights or reflectors and usually wearing dark clothing. Ninja cyclists typically ride against traffic and/or on sidewalks in violation of local laws.
(after slamming on brakes) "I didnt even see that ninja cyclist blow that stop sign. I could have hit him"
by Bike Man November 03, 2009
In Oregon Trail II, this term is used when someone in your wagon party dies inexplicably from cholera.
by A Dysentery Germ September 24, 2016
When you send someone a naked picture of themselves that they don't know you took. Especially useful as a pick-up technique.
"Dude, Anna just sent me a ninja sext!!"
"What do you mean?"
"She just sent me a picture of MY penis, but I've never been naked in front of her? WTF??"
"True ninja broseph. She's a ninja sext master."
"What do you mean?"
"She just sent me a picture of MY penis, but I've never been naked in front of her? WTF??"
"True ninja broseph. She's a ninja sext master."
by Ninjasextmaster69 May 23, 2011
1.Of or relating to a ninja being highly skilled in combat, stealth, and covert actions. Most often known for being stealthy and deadly assassins.
2. The ability to perform duties efficiently and without hesitation to the highest level of perfection without detection
3.An action against a person without the victim knowing what hit them
2. The ability to perform duties efficiently and without hesitation to the highest level of perfection without detection
3.An action against a person without the victim knowing what hit them
by Madnass July 08, 2012