When somebody as an above average or otherwise huge penis when erect but shrinks to near disappearance when flaccid, or in other words vanishes like a ninja.
Example: That mother fucker has a ninja dick.
Example 2: I got ninja dick. that shit maybe 1 or 2 inches long till I get a hard on but then that shit massive.
Ashley : Brady has a total ninja dick, it was so weird!
Amanda : Oh gross no way!!!
When you pick at your face so hard from using Crystal that you gain a 3rd eye between your eyebrows that looks like a ninja star was thrown at you.
Kiesha got ninja starred in the face.
A person selling sexual services. One who is stealth. Strong. And willing. An escort or prostitute. A word that elevates the profession rather than it being derogatory.
Why don't you call and get a few sexy ninjas over here and we can all have a good time.
I'm a sexy ninja by profession.
Someone sitting in the stall next to you whom you never hear until the toilet flushes, the sink goes off or just the bathroom door open and close.
Jim heard what I said about him in the bathroom; damn he must be a stall ninja!
the day where we applause ninja turtles
Tom: Hey did you know its national ninja turtle day
A 3 inch midget with a baby cock that likes to get cocky even tho he gets banned off PlayStation for not drinking enough water. He also likes to shout when you make a joke and take his water bottle.
“PASS THE REMOTE JOE”
“CLOSE THE BLINDS JOE”
“GET OFF PLAYSTATION JOE”
“You’re not a ninja joe”