Green’s Dictionary of Slang

plain, broad-faced; thus platter face n. (and ad hoc vars.), a plain face.

1639		J. Taylor Crabtree Lectures 131: I call him Owle, and Booby, and now and then saucer-ey’d slave and platter-fac’d rascall.
1674		Hogan-Moganides 40: The platter Mouth and Face – This brats Face!
1675		T. Lupton Thousand Notable Things 269: Take a Description of an illfavoured Woman, yet exceedingly doted upon by a fond foolish Lover: Her skin and Face pimpled; pale; Yellow; Tanned; Tallow-fac’d; a swoln Juglars; Platter Face; a Thin lean Chitty-face.
c.1698		B.E. Dict. Canting Crew n.p.: Platter-fac’d-jade, a very broad, ord’nary faced Woman.
1707		N. Ward London Terraefilius III 6: Here comes a Swanking Widow for you, who [...] has as much Flesh upon her Back as a Fat Lincolnshire Bullock. Her Face, by Computation, is about the breadth of the Pewter-Platter.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1826		Morn. Advertiser (London) 18 Sept. 4/1: A complaint against Dominick Fagan, a platter-faced Lough-Neath man.
1830		Dublin Wkly Register 7 Aug. 3/1: With this policeman (who was platter-faced, broken-nosed, frosty-visaged Palatine) we had to remonstrate.
1834		Examiner 8 June 2/1: Wrinkled, pimpled, red, have a swollen juggler’s platter-face.
1841		Lancaster Gaz. 14 Aug. 4/2: The landlord — a red, platter-faced man.
1852		Athens Post (TN) 17 Dec. 3/2: The laugh of that platter-faced, portly-bellied, jolly-looking man [...] possesses a rumbling sound.
1862		Freeman’s Jrnl 5 Nov. 4/6: A platter-faced young gentleman [...] was brought into custody, charged by his mother [...] with stealing a pair of blankets.
1872		London Eve. Standard 5 Apr. 5/5: [in fig. use] Holland is but a platter-faced, cold, gin-and-water vountry.
1878		Examiner 18 May 20/2: Oliver [insisted] on marrying a ‘platter-faced maiden".
1897		Waterford Standard 1 Dec. 4/1: ‘She’s a moon-eyed, platter-faced fright’.
1903		Jasper Wkly Courier (IN) 25 Sept. 3/1: ‘Fred, you old stupid’.
c.1940–5		‘Myles na gCopaleen’ Best of Myles (1968) 328: The illiterate stupid ... clodbrained ... half-witted ... platter-faced ... cuckoo.
1987		(con. 1930s) L. Redmond Emerald Square 149: I’d like me job, congratulatin’ that plattherfaced bitch an’ her sly bastard of a husband.