Green’s Dictionary of Slang

geezed (up) adj.

[predates geeze (up) v.]

1. (US) drunk.

[US]M. Prenner ‘Sl. Synons. for “Drunk”’ in AS IV:2 102: basted [...] geezed, ginned, half seas over.
[US]A. Hardin ‘Volstead English’ in AS VII:2 88: Terms referring to the state of intoxication: [...] Verbs: Geezed.

2. (US drugs) intoxicated by drugs.

[US]Goldin et al. DAUL 77/2: Geezed up. See Geed-up [i.e. intoxicated by drugs].
[US]J.E. Schmidt Narcotics Lingo and Lore 66: Geezed up – Of a drug addict, walking the stilts of narcotic exhilaration.
L.R. Parenti Durata Del Dramma 100: [Better] laughing and stuffing their faces than somebody all geezed up and going off in a rageful tangent.