iced, adj.³ — Green’s Dictionary of Slang

iced adj.³

1. drunk, thus half-iced, tipsy.

1965

H. Williamson Hustler 66: My cousin had come and took her, and got her drunk. Got her half iced.

2. (drugs) intoxicated by (crack) cocaine.

1974		D. Gober Black Cop 47: The bitch had been snorting coke....She wasn’t completely iced. She was just mellow [HDAS].
1993		R. Shell Iced 62: I had smoked myself into a glacier state. I needed warmth. I was iced.

iced to the eyebrows (adj.)

extremely drunk.

1953

R. Chandler Long Good-Bye 27: ‘Sylvia dead drunk, paralysed, spifflicated, iced to the eye-brows,’ I said harshly.