A sexual ambush technique in which a man lays on his back in wait for an unsuspecting woman, all ready to ejaculate. When the woman comes into striking distance the man rises from the ground quickly and chucks his custard in one insertion. While the woman is stunned, the man takes his leave.
Woman: Honey, I'm home!
Woman: What was that? I thought I felt something...
(1 month later)
Doctor: You're pregnant, it must have been the White Ninja.