When your having sex with a super hot girl that you really like and realize you can't cum. So, in order to distract her from this issue you fall over and do an elaborate ninja flip off the bed with hopes diverting her attention away from the fact that you cant cum and towards your awesome ninja flip.
i was with this super hot girl last night and i couldn't get off so i had to pull the can't cum ninja bailout
by just a little mah'gee September 20, 2011
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Ninja Cum: (1) The act of cumming inside of somebody without them ever knowing. (2) Also, the act of cumming on an unsuspecting victim without them knowing.
(1) Girl: Well that was fun, sorry you didn't finish Guy: I liked it ... one week later. Guy to Friend: I totally ninja came (past tense of ninja cum)

(2) Person 1: (time to ninja cum) *jerk, jerk, jerk* Person 2: *yawn* Person 1: *SPPPLOOOOOOSSSSHHHHH* Person 2: *yawn* Person 1: *silent zip* well, see you later. Person 2: bye
by will foster April 14, 2008
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Ninja Cum (verb) is the wholesome act opon which a man sneaks behinde a unknowing victim (usually female) to simulate the characteristics of a ninja. Than proceeds to ejaculate over the unknowing victim,

then vanish to avoid atention of the victim to the next target.
Example

Guy1: "Dude, you should totally ninja cum that chick over there!"

Guy2: **Sneaks to unknowing victim then ejaculates all over her then get away without being noticed**

Her: "Like OMG WTF, Who just cummed all over meeee!"
by TheRealEnglishMan May 29, 2019
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