Green’s Dictionary of Slang

bazoo n.2

also bazoonus
[gazook n.]

(US) a lout; a fool.

[US]E.W. Townsend Sure 43: You’ll hear wise bazoonuses pass it along dat dere is so much trouble in de woild you’ll get more dan you can take care of [HDAS].
[US]Hostetter & Beesley It’s a Racket! 219: bazoo—An easy victim.