The word "Prodigal" is defined in the dictionary as "reckless" or "extravagant."  In the famous parable of the Prodigal Son, the one who is truly reckless is the FATHER in the story!  He is wonderfully reckless and extravagant with his love to his two sons - both of whom had let him down.  Jesus tells the parable to teach us about his love, which is relentless in seeking us out, even at our worst.