Scun is the 60's LA Hell's Angels term for brown sticky highly potent bath tub methamphetamine. It is the only form of meth that is strictly injectable, because of its consistancy (A.K.A peanut butter dope). The term is associated with the slam a gram ninja clan (notorious for shooting up whole grams in one dose). Scun is also a sludge metal(bongzilla/eyehategod-esque) band from Arkansas.
That 50 shot of scun took my f#cking breath away.
by professor king July 10, 2008