Green’s Dictionary of Slang

pumpkin-headed adj.

[pumpkin head n. (1)]

(US) stupid.

[[UK]T. Walkington Optic Glasse of Humors 65: Like pumpion-headed Solomists they looke / The dull earth is their contemplation booke].
[[UK]W. Kenrick Falstaff’s Wedding (1766) III vi: fal.: Thou pumpion-headed rascal, stay, or — bar.: Give me good words, then, Sir John. Why pumpkin-head, pray now? fal.: Hast thou never seen a pumpion, [...] set over a candle’s-end, on a gate-post, to frighten ale-wives from gossiping by owl-light? That is a type of thee – that is thy emblem: thy head being hollow, full of light, and easily broken].
[US]T. Haliburton Clockmaker II 139: The stupid, punkin-headed, consaited blockheads!
[UK]Bristol Times 5 Sept. 3/3: That empty popinjay pumpkin-headed peer.
Lincs. Free Press 27 Aug. 2/4: We decidedly object to great lob-sided pumpkin-headed fellows bweing appointed to lucrative offices.
[US]Dly Press (Cincinnati, OH) 14 June 1/4: We cannot imagine who this cold [...] pumpkin-headed, magnifying numbskull of a croaker is.
[UK]Stamford Mercury (Lincs) 18 Nov. 5/7: You pumpkin-headed fool.
[US]Morn. Star (N.O.) 7 Mar. 2/1: Nobody but that pumpkin-headed wife of mine is capable of that.
[US](con. c.1840) ‘Mark Twain’ Huckleberry Finn 300: And Uncle Silas [...] sends the key to the punkin-headed nigger, and don’t send nobody to watch the nigger.
[Aus]‘Rolf Boldrewood’ Colonial Reformer III 127: They’ve persuaded her into marrying that pumpkin-headed, corn-eating Hawkesbury hog, just because he’s got a good farm.
[US]Eve. Bull. (Honolulu) 20 Apr. 4/2: A pumpkin headed ignoramus.
[US]Eve. Star (Wash., DC) 29 Dec. 56/2: [cartoon caption] I hereby resolve ter swear off associatin’ with punkin-headed, hyena-faced, scared-cat firemen!!
[US]Hawaiian Star (Honolulu) 14 Oct. 6/4: Nobody gives a tinker’s cuss whether the pumpkin-headed Tankanmotu runs twenty miles.
[UK]Wodehouse Jeeves and the Feudal Spirit 80: Would I be correct on describing him as a pumpkin-headed oaf?
C.L. Sulzberger Tooth Merchant 183: I am not as pumpkin-headed as I look. Maybe I can help you.
[US]W.T. Vollmann You Bright and Risen Angels (1988) 329: The country pumpkin-headed cornholes get some cheap sophistication.
[US]K.C. Swint Mudslingers 178: He was drawn as a hopelessly nearsighted and pumpkin-headed clown.
[US]J.L. Nutt Confessions of a Bipolar Firefighter 373: All because some big, fat-ass red pumpkin-headed selfish bitch wanted to get married.