When your blacked out, yelling at everyone, cant walk and pissed onsomething in your bedroom and you only started drinking 2 hours ago
Bartender: what's wrong with your friend?
Person 1: oh he is just zacked out.
Bartender: really, I feel like he just got here. Well, I'm gonna have to cut him off
A term that can apply to any fucked up or wierd situation. Can also be used to describe a spastic or insane person that should be on strong medication, or a plain stupid person.
Guy "Fuck! my car broke down, my girlfriend dumped me for another girl, my wife just left me, and now I have a burning case of the herpies"
Friend "What? That shit is Zacked bro!"
Girl "Did you see that guy over theretalking to a tree and then trying to hump it?"