Green’s Dictionary of Slang

carbuncle face n.

[SE carbuncle, an inflamed abscess + face]

a face covered in boils and pimples.

[UK]B.E. Dict. Canting Crew.
[UK]Northampton Mercury 23 Sept. 3/3: Deserted from [...] the 14th Regiment of Foot [...] James Biddel [...] swarthy Complexion, lank black hair, Carbuncle-faced.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[US]Green Mountain Freeman (Montpelier, VT) 28 Aug. 2/7: Bringing the paper near his carbuncle face and straining those ‘visual organs’.
[UK]Dundee Courier 14 Aug. 4/3: A drunken, mahogany-faced, carbuncle-nosed blacklsmith.