The act of both parents grabbing a hold of their newly born, unwanted child and pulling in opposite directions until the baby comes apart. The goal of this is to see who gets the bigger half, much like breaking a wishbone.
The winner is said to have peace and prosperity for their entire life.
"Man I can't believe she got knocked up again. We need to have a game of tug-a-baby when this bastard is born."
"I have been having bad luck lately, I need to have a kid so I can play tug-a-baby and win. Then I'll be lucky."