by Don Jr. March 16, 2025

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.
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.
by Pickle Reeves May 3, 2023

by iiiCassh November 24, 2018

When you stealthily sneak-into your girlfriend's home after her kids have gone to sleep, so you can get some.
by Ojete April 27, 2014

You know that guy I took home hes was swift he was like a minge ninja in and out before I knew it....premature
by Chop81 April 3, 2021

when someone opens up to their fear or tells a deep story about themselves, but is interrupted by someone who says something unnecessary or asks some nonsense. the phenomenon is called beeing "ninja turtled"
by Merihaka July 29, 2021

Ninja, a fortnut player that seems to be getting bigger in popularity by the moment. (As of 2018)
Ninja has been known to be dying of ligma recently.
Ninja has been known to be dying of ligma recently.
by What if I don't want a usernam November 11, 2018
