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