Following an action or the transfer of an object from one party to another, vocalizing, "black, black no trade back" prevents the receiving party from returning the action or object to its originator.
After giving Quin a paper ball, his father says, "black, black no trade back", leaving Quin stuck with the object. He must keep or dispose of the ball without returning it to his father.
by LapisLazuli January 13, 2014