When you get so drunk that you give people head without knowing it and get introuble by everyone because your so shitfaced that you tell everyone and dont even know it.
I was so shit faced last night i gave that guy head!!!
The result of drinking alot of alcohol, you usally get shit faced when you feel like throwing up, you also get shit faced in the morning when the hang over starts.
So really, shit faced is the period of when you feel like shit after drinking.
Bar Tender - NO ! you have had too much for tonight !
Drinker - Gimme some booze dammit !
Bar Tender - OK ! but only ONE more, you'll end up shit faced and pass out !
Drinker - THANK DRUNK IM GOD !
1) To have one's entire face covered in feces.
2) To become so intoxicated/high that you act like an asshole/whore/your math teacher and perform things/sexual acts that you would never do in your right mind.
1) Because my face is covered in shit, I am shit faced.
2) God, after those 15 bottle of scotch, I was shit faced and woke up next to my math teacher.
"i wasnt"
"you told a random guy at the bar that you sucked your sisters best friends tits in 4th grade"
"fuck i thought id never say that"
"whaaaa???!!"