Green’s Dictionary of Slang

‘a Fulsom, Beastly, Nasty Woman’ (B.E.).

1607		R. Carew (trans.) Estienne’s World of Wonders Pref. 10: The country swains contenting themselues though they haue not the fairest, take the woodden-fac’d wenches and the ill-fauourd-foule-fustilugs for a small summe.
1621		R. Burton Anatomy of Melancholy (1651) III.ii.IV.i: Every lover admires his mistress, though she be [...] a vast virago, or [...] a fat fustylugs.
1639		Junius quoted in Ency. Dict. n.p.: You may daily see such fustilugs walking in the streets, like so many tuns [N].
1674		T. Duffet Empress of Morocco Act I: Fye, Fye, Fustilugs, be not yellow For he is but a dungy Fellow.
c.1698		B.E. Dict. Canting Crew n.p.: Fustiluggs, a Fulsom, Beastly, Nasty Woman.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785		Grose Classical Dict. of the Vulgar Tongue n.p.: Fusty Luggs, a beastly, sluttish woman.
1811		Lex. Balatronicum [as cit. 1785].
1822		R. Nares Gloss. (1888) I 341: fustilugs. A very fat person; so said to mean in the Exmoor dialect. Sherwood also translates it in the French by ‘Coche, femme bien grosse;’ otherwise I should have derived it from fusty and lugs, i.e. musty ears.
1834		Examiner 8 June 2/1: A vast virago, a fat fustilugs, whom thou couldst not fancy for a world.
1886		Western Times 28 May 2/4: Fustiluggs — a big-boned person — Ill-favoured.