how long does thc really stay in an occasional smoker's system. aka, someone who smokes one weekend, and then not again for months. how long after the smoke until their piss is clean?
hmmm, it really depends on how active you are, because THC is in FAT cells the more althetic you are the quicker it leaves your system
well, check out this thing on erowid about it: http://www.erowid.org/experiences/exp.php?ID=37341 this is only thing that reassures me to keep smoking occasionally, because my parents randomly drug test me.