Originally Posted by SPeRMiNaToR

buy some niacin,exlax, and 3-4 gallons of water. pop the niacin+exlax, start chugging water. and wear workout gear (sweatshirt/sweatpants)

It worked for me when I was suprised with a piss test. i had 48 hours but I think you'll be fine. My piss was 100% CLEAN even though I smoked weed everyday for 6 months prior.

no guarantees though. just my experience