ninja fapper

To masturbate/fap silently.
Dave: Why is fapping called fapping?
Max: Because fap is the noise it makes.
Dave: I've never heard that before ..., I must be some kind of ninja fapper
by honkthedonk January 17, 2013
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ninja cyclist

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
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Ninjas on the lawn

Along with paranoia, ninjas-on-the-lawn is the most common side effect of cocaine.
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."
by SnowhuouV October 24, 2012
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ninja rowson

Ninja Rowson is one of the best maths teachers to have. He will perform a dance called the Ninja dance where he moves around as If he was a ninja whilst impersonating a Chinese/Japanese accent. He is a good teacher although sometimes he gets in a strop and sits back down in his chair for around 10 minutes of the 60 minute lesson you have with him .
"It's not fair you have an alright maths teacher" - Tyler

" what are you on about you've got Ninja Rowson"
by XD :) July 29, 2019
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INF ninja

(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.
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.
by Lt. August 10, 2004
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invisible ninja

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
Dude! Why are you fighting invisible Ninjas! Stop flailing your arms around like a windmill.
by stragen November 02, 2012
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Ninja Smokeout

When a friend secretly smokes you out at an awkward or boring social event.
remember the time you guys smoked me out when i was watching eclipse with my girlfriend? man that was a pro ninja smokeout
by SirSmokeaLotz December 23, 2010
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