by ironpikachu February 19, 2010

(noun) 1. a player of the online FPS Infiltration who displays a marked ability to kill an opponent with great speed at close ranges. often while armed with a knife.
2. a player that fires on opposition forces to great effect, while moving or concealed in deep shadows.
3. a player who kills most or all of the enemy team without being shot or disabled. Often a veteran that is picking up slack for a noob and deserves praise.
4. a skilled INF player who commands respect, despite using overt tactics.
5. used derogatorily towards players that uses cheap or cheesy ambush tactics that do not reveal their location. Also a player that does not give quarter, especially in the first few seconds of combat, when quarter may be due.
6. any person or object stealthy, skilled, armed with a gun, treacherous or otherwise similar to an INF ninja.
2. a player that fires on opposition forces to great effect, while moving or concealed in deep shadows.
3. a player who kills most or all of the enemy team without being shot or disabled. Often a veteran that is picking up slack for a noob and deserves praise.
4. a skilled INF player who commands respect, despite using overt tactics.
5. used derogatorily towards players that uses cheap or cheesy ambush tactics that do not reveal their location. Also a player that does not give quarter, especially in the first few seconds of combat, when quarter may be due.
6. any person or object stealthy, skilled, armed with a gun, treacherous or otherwise similar to an INF ninja.
1. Dude, no way you can kill him with that knife. Holy shit you just did! you are an INF ninja!
2. Who, I almost shot you man. you're an INF ninja in those shadows.
3. Oh snaps! our INF ninja is taking tan-team OUT!!
4. Watch out, that guy with the SAW is an INF ninja.
5. Arg! I take ten steps and I'm dead. Damn INF ninjas!
6. Man, those guys in the film Returner were INF ninjas.
2. Who, I almost shot you man. you're an INF ninja in those shadows.
3. Oh snaps! our INF ninja is taking tan-team OUT!!
4. Watch out, that guy with the SAW is an INF ninja.
5. Arg! I take ten steps and I'm dead. Damn INF ninjas!
6. Man, those guys in the film Returner were INF ninjas.
by Lt. August 10, 2004

What some rappers, most notably Devlin fight whilst rapping - Moving their arms around like windmills trying to look "street" they look like they are blocking attacks from invisible ninjas
by stragen November 2, 2012

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

asshole: "What is that outside?"
you: "I'm not sure, but i think it could be NINJAS."
asshole: "There are no ninjas on the lawn."
you: "OF COURSE THAT'S WHAT THEY WANT YOU TO THINK; THEY'RE NINJAS."
you: "I'm not sure, but i think it could be NINJAS."
asshole: "There are no ninjas on the lawn."
you: "OF COURSE THAT'S WHAT THEY WANT YOU TO THINK; THEY'RE NINJAS."
by SnowhuouV October 24, 2012

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 3, 2009
