Tweaker Feature

An uncontrollable spastic muscle twitch or other unnatural jerk that is a tell tell sign of long-term meth use or signs of getting ahold of some bad shit.

MK- " man, I know he's getting high "
HB - " who?"
MK - " my brother"
HB - " are you serious? How do you know"
MK - " see how the corner of his mouth is all weird and twitching, kinda like a fucked up Elvis lip? That's his tweaker feature"
HB - " no shit? Man that's weird AF"