Green’s Dictionary of Slang

foolish, stupid.

1639		Ford Lady’s Trial III i: You are dull clod-pated lumps of mire and garbish.
1712		J. Arbuthnot Hist. of John Bull 23: John was not so clod-pated.
1722		S. Centlivre Artifice Act III: You don’t know the Pains I take with my clodpated Family.
1781		Hicky’s Bengal Gaz. 19-26 May n.p.: Of al the Animals that move on Earth, there is none so completely mischievous as a wickeed [sic], dull, clod pated Country Justice.
1822		(con. early 17C) W. Scott Fortunes of Nigel III 120: She is but the wife of a clod-pated old chandler.
1852		N.O. Dly Crescent (LA) 9 Feb. 1/6: ‘If I slay thee thou hireling dog, as I have often slain thy clodpated countrymen...’ the Frenchman laughed fiercely.
1860		Dly Dispatch (Richmond, VA) 16 May 2/1: A more narrow-minded, ill-informed, clod-pated set of boobies could not be found within the four seas.
1868		‘Parliamentary Vade Mecum’ in Sydney Punch 14 Mar. 8/1: Adjectives [...] Clod-pated.
1922		Hull Dly Mail 13 Feb. 6/5: Clod-Pated Doddipoles whose one ambition [...] is to [...] besmear [...] the glorious province of Literature.