Convince your mom you'll just use someone elses urine unless she watches you.

Then piss on her leg. When you have to explain it later, tell her you were stoned as fuck and trying to stand still and focus on a cup was making you dizzy.

I think it's funny that they threatened to pull you out of college. I mean, "If you're going to smoke pot, I'm going to ruin your chance at a successful future by withdrawing you from college"

Anyway, if moving out isn't an option, or isn't worth it for weed, do drugs that don't show up on tests. DXM, Shroomz, Salvia, Ayahuasca, some research chemicals, nitrous oxide, nutmeg((im serious. Don't smoke it. Eat three big spoonfuls, or 1 89 cent grocery store container.)), HB Woodrose seeds, Morning Glory seeds, catnip joints ((lol)), Skullcap & Damiana, alcohol((only tests positive a few days after)), PEYOTE!!!, San Pedro Cactus, DMT((ayahuasca)), Oxycodone, any painkiller with aceteminophen ((sp.?)), LSD((heh... if you can find it.. it only shows up for a few days after you do it)),.

Anyway. Im not promising you any of those won't be tested for, but most of em aren't, even in an extended drug test. Anyway, do lots of drugs.