Walkerton Wild Child
The act of performing anal sex with a pregnant woman, in which the anal thrusting is so vigorous that labor is induced and the child is born. Note that it is recommended that the woman be in the reverse cow-girl orientation, so that her afterbirth does not contaminate the man's stomach.
With his pregnant wife two weeks overdue, Mr. Schmidt saved the day by performing the Walkerton Wild Child on an emergency room bed.