Green’s Dictionary of Slang

1. (US teen) extremely drunk.

1967–8		Baker et al. CUSS.
1970		Current Sl. IV:2.
1980		Eble Campus Sl. Fall 3: faced – very drunk.
1999		T. Dorsey Florida Roadkill 40: He was completely faced.

2. (drugs) stunned by the potency of a drug, usu. cannabis.

1986

S. King It (1987) 42: I was pretty ’faced, you know?