Top definition
The remaining jizm or spunk that eminates, some time later, from ones japs eye after a wank. Even after a good shake and pipe clean.
After a morning wank before work, you clean up and head to work only to find when you go for a piss you have found a whole load of Ninja Jizz.
by tehsnrub August 28, 2009
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2
When there is visible jizz on one's pants, yet the wearer of said pants has no idea how it came (no pun intended) to be there.
Emily: Nice white splotchy thing on your crotch...
Cara: Oh, it's just the light.
Emily: Are you sure...?
Cara: Unless I'm being ninja jizzed, there is nothing there!
by ThatPurpleChik March 22, 2010
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