Slang for 'exceedingly
smashed'. Can happen
from alcohol,
pot,
hallucinogens such as
LSD, or a few other chemical
intoxicants. But it's certainly funniest to declare when you're really
stoned:
"I'm shnacked, man".
Note that it's
pronounced as one
syllable: 'shnakt', and not 'sheh NAKT' or anything like that.