A state of crazy drunkeness. Most definately the best result of drinking. While being shacked, a person's inhibitions are left at the door. Because of this, getting laid is a very easy task. Bottom line: getting shacked is the best state of drunkeness.
A group of Matt, Vince, Brandon, Blake: So who's ready for the party tonight?
Matt: I am, I haven't gotten drunk in a long time, it's gonna be awesome.
Vince: It should be pretty great...I hope it's chill.
Brandon: Yea, it should be good. If not, we'll just bring the party back to my house.
Blake: I don't give a fuck, it's gonna be epic. I just wanna get Shacked!