When you run out of dope and you put water through the stem. So your smoking the stem dope with water.
Person 1: "Damn man!! I'm out of dope.."
Person 2: " that's ok, just ru. Some water through the stem and we can smoke the dirty gurdy!"
Tweaker, tweaker being obvious!
someone who is so high off meth that you can clearly tell.
Person 1: "Omg do you see that guy over there?"
Person 2: "Yeah talk about ttbo!"