its verb substitute-able for any word
yo son my zwack is off the chai (zwack is the substitute for swag)
Yo kid i was zwackin her so hard (zwack is the sub for Fucking)
bro i have no idea what happened last night that was so zwack Zwack is the sub for awesome)
To get to a degree of intoxication that blacking out and absolute ridiculousness are inevitable. Basically, taking a large amount of hard liquor straight to the face.
Man #1: Yo you remember calling that girl a dick taking cum dumpster?
Man #2: Hah, nah man i was zwacked outta my mind.