Ninja Mask

After someone drops a stank bomb, the other person covers there face with there shirt leaving only the eyes exposed. If stank is strong enough They will quickly exit like a ninja.
Man Look at Dave go, Kevin must had dropped a stank bomb, Its like he dissapered in a puff of dodo gas.

Was he even wearing a ninja mask?
by mutant ninja turtle September 18, 2010
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ninja slut

A women who sleeps around without anyone knowing
Angelina Jolie is a ninja slut
by Malicor November 21, 2011
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Conversation Ninja

One makes a single random comment in someone elses conversation, which ends up killing it and making it awkward for everyone else. This is similar to a ninja swiftly killing a target then exiting.
Guy 1: Hey, do you see that really hot chick over there?
Guy 2: Hell yea, Id hit that all night!
Conversation Ninja: I screwed her and gave her herpes *disappears*
Guy 1: Oh... Im gonna go now.
by ThruTheDesertOvrTheFence September 14, 2009
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Ninja Exit

To make a ninja like escape from the other party of a one night stand, upon waking and find they seem to have grown ugly over the period of sleep.
Man, you shoulda seen the heffer i hooked up with last night, woke up, and did a ninja exit out the window.
by J2Racing November 20, 2007
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Awkward Ninja

When a person suddenly appears out of nowhere like a ninja and instantly makes you feel uncomfortable, often causing an awkward silence, then disappears just as quickly
First Guy: "Then, Tommy's friend just popped up out of nowhere and started listening to our conversation, no idea how long he was standing there."
Second Guy: "Then he disappeared next time you looked over?"
First Guy:"Yeah, how did you know?"
Second Guy: "He's an Awkward Ninja"
by SuperBambi May 23, 2010
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Cotton Ninja

A racial slur for a negro. comes from when a negro disappears like a ninja when cotton is in the need of picking
Where did that Cotton Ninja go? He needs to get to work!
by Spear Chucker #44866 April 23, 2011
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Research Ninja

When you see a hot girl in a YouTube video and you want to know who she is (obviously for research purposes), you ask that in the comment section. Then a Research Ninja volunteers, do his research, risk his life to stalk her on the internet and get you the information you want.
Person 1: Does anyone know the girl at 05:04? For research purposes of course.
Person 2: Her name is XXXX YYYY
Person 1: Thanks Research Ninja! You saved the day.
by totem_pole August 12, 2015
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