Adjective
(slang, vulgar) Very drunk.
When they brought in that keg, I knew I was going to get shitfaced.
(slang, vulgar) Under the influence of mind-altering drugs.
Source: en.wiktionary.orgOr if you're in the hood, shitfaced drunk and need some soakage, mange! Source: Internet
I have attended one of his concerts (I was shitfaced), but only one. Source: Internet