Green’s Dictionary of Slang

boozy n.

[booze n. (1) + sfx -y]

1. (US) a drinking session or its aftermath.

Raftsman’s Jrnl (Clearfield, PA) 26 Nov. 1/6: I thort the best place for me was in bed — so as to sleep off my boozy.

2. (Anglo-Irish) a drunkard.

[UK]Partridge DSUE (8th edn) 119/1: since ca. 1920.