Green’s Dictionary of Slang

stupe-head n.

(US) a fool.

1884		J. Harrison ‘Negro English’ in Anglia VII 278: Er stupe-head = a stupid dunce.
1947		M. Abzug Seventh Ave. Story 72: You sound like a stupehead. What do you wanna be, white like a virgin?
1981		Spears Sl. and Euphemism.
2005		posting at www.nationalview.or 6 Sept. 🌐 And what a STUPEHEAD. [...] how could anyone with even half a brain cell think that you could cram thousands of poor people into one confined, hot and sultry place.