An act of mischief in which you drive a vehicle through someone's yard in order to leave tracks or ruts. Best done during, or just after a good hard rain. The ultimate accomplishment is to back right up to the front door and "put the pedal to the medal" spraying mud and grass all over the front of the house.
Brian was talking smack today. But that's okay, we'll go yard farming at his house tonight. He'll learn not to run that mouth.