Green’s Dictionary of Slang

stewie n.1

[stewed adj.1 (1)]

(US black) a drunkard.

[US] ‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.
[US]H. Ellison ‘The Dead Shot’ in Deadly Streets (1983) 170: He’s a bum. A real stewie.