(US) the head.
|Sandburrs 10: Mebby he gets funny in his cupolo, bein’ up so high.‘Mulberry Mary’ in|
|Alaska Citizen 28 July 8/4: You never will land a Johnny-boy that’s got enough gray matter in his cupola to want a real, bang-up flossy lady for his kiddo.|
|‘Our Boarding House’ 27 Dec. [synd. comic strip] Smoking (bad cigars) [...] finally smogged his cupola [W&F].|