A quick, unexpected forward action of the foot which makes contact with the upper part of another person's body. It is defined by flexibility, agility, spontaneity, force and effect of impact.
Did you see the fight between Jimmy and Alice?
Yeah man. Fuck. She Ninja-Kicked him in the face.
There was blood everywhere.
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Taking a photo in public with your cell phone without anyone knowing you just snapped it
My friend's wife was having a drink with another man so I moved closer and got a ninja pic to send him.
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To ejaculate so fast and stealthy, no one sees you do it.
Why is he so relaxed? Maybe he ninja popped one in the ally?
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1.(Noun) A term used for when you don't want to talk to someone but they instant message you over facebook. You then proceed to not let your presence known, and go into a ninja hiding position.
2. (Noun) A term for someone who does not appear to be online facebook, but goes around and comments on everyone's wall.
3. (Noun) A term for someone who is not in the social networking exchange known as facebook, but is tagged in pictures and messages.
"Hey Daniel ;) "
*Oh God, do I really have to talk to her?*
*5 minutes later with no response*
"Daniel, stop being a ball-less facebook ninja and talk to me!"
Kelly commented on Daniel's status
"What? Kelly's online? But she's not on my 'online' list.... what a facebook ninja."
*looking at a friend's picture with a hot chick in it*
"Oh wow, who is SHE?"
*searches for her, can't find her*
"Dang it! She's a stupid facebook ninja! Gah!"
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A Fap Ninja is someone who can masturbate on several occasions without ever getting caught.
Person One: "Whoa bro, I didn't even get caught, again!"
Person Two: "Whoa man, you're a real Fap Ninja!"
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An individual who wakes up in the middle of the night, sneaks downstairs and steals snacks unnoticed.
If being a kitchen ninja is wrong, why is there a light in the fridge?
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One who is deft in the kitchen.
"Cumbie is a Kitchen Ninja, he seems to work every station with ease.
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