What is the fastest way to get marijuana out of your system so that you can pass a drug test?

Drink tons of water. Litterally always be drinking. My friend had a drug test and 3 days before the time he just started drinking huge amounts of water. He had been stoning for 3 or 4 months everyday and the test came back almost negative! So drink lots of water or cranberry juice and go to the bathroom as much as you can.