Green’s Dictionary of Slang

(US; later use N.Z.) tipsy.

1737		B. Franklin ‘Drinkers Dictionary’ in Pennsylvania Gazette 6 Jan. in AS XII:2 90: They come to be well understood to signify plainly that A MAN IS DRUNK. [...] Buzzey.
2002		A. Duff Jake’s Long Shadow 134: Polly, buzzy from the champagne, kissed him.