noun: The person usually relied upon to achieve what amounts to a miracle when given impossible circumstances. This person is often found in a workplace, is underpaid and overworked, and usually ends up going postal. Also referred to as a 'discount miracle worker'.
Boss: "Jimmy, I need you to compile the last 3 years of P&L statements for the board meeting in 30 minutes."
Jimmy: "Right! What do I look like, some Snake Oil Jesus?"
Boss: "I knew I could count on you to come through. See you in 30!"