According to several Korean business men, a 'Jack Jew' is someone who is a wall street mother fucker, the type of Jew who, unlike his Orthodox brothers (i.e. Matisyahu), do not take their faithseriously. Instead they are fake money grubbing whores.
Korean business man says in think Korean accented English to his friend: "Why you be jack jew with me?! You inflate stock price for going public, make lots of money and fuck me? You jack jew."
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.