Green’s Dictionary of Slang

illuminated adj.

drunk.

1908		B. Fisher A. Mutt in Blackbeard Compilation (1977) 72: Beany’s goat slightly illuminated from taking ships’ mascots on a slumming trip.
1912		Sydney Sportsman (Surry Hills, NSW) 15 May 3/7: Then it struck him to go on the ‘Mother's Ruin.’ He and hiis cobber got well illuminated.
1919		E. Hemingway letter 3 Mar. in Baker Sel. Letters (1981) 21: I think of [...] you and me, a little illuminated sometimes, but always just pleasantly so, strolling through that great old place.
1924		O.O. McIntyre New York Day by Day 31 May [synd. col.] Most of the [...] dancers were well illuminated with ‘Bowery smoke.’.
1931		A. Hardin ‘Volstead English’ in AS VII:2 88: Terms referring to the state of intoxication: [...] Verbs: Illuminated.
1944		P. Kendall Dict. Service Sl. n.p.: He might have been a little illuminated [...] but he certainly wasn’t drunk.
2023		R. Milward Man-Eating Typewriter 107: I was usually half-rats — sometimes illuminated to the extreme.