Green’s Dictionary of Slang

bubbleheaded adj.

silly, foolish.

1953		S. Bellow Augie March (1996) 53: He didn’t like to see my bubble-headed friends get me in dutch.
1962		(con. WWII) J.O. Killens And Then We Heard The Thunder (1964) 15: If he ain’t no sergeant you sure ain’t no corporal, so get up off it, you bubble-eyed punk. [Ibid.] 45: Tell him what I say, Solly. Tell this bubble-eyed fool something.
1978		Time 6 Nov. 88: He is making love to his wife (a porky and bubbleheaded blonde).
1987		S. King Misery (1988) 219: Novelist best known for his series of romances about sexy, bubbleheaded, unsinkable Misery Chastain.
2003		Mad mag. Oct. 52: I’m All-American. I’m clean-cut. I’m a bubblehead slut.