Green’s Dictionary of Slang

a good bargain; thus get/have a lumping pennyworth, to marry a fat woman.

1705–07		N. Ward Hudibras Redivivus I:4 22: A lumping Pen’worth will you buy / You’ve all this for a Half-penny.
1708		W. Taverner Maid the Mistress IV i: Does your Uncle’s Will say you must be with Child before you are married, if so I shall have a lumping Pennyworth.
1712		J. Arbuthnot Hist. of John Bull 121: Thou shalt have a lumping penny-worth.
1785		Comical Hist. of Simple John 2: They’ll get a lumping pennyworth O’ me.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Lumping, Great. A Lumping Pennyworth, a great deal for money, a Bargain.
1792		Chester Chron. 3 Aug. 3/3: We have been favour’d with a lumping pennyworth from a poetical wight, who stiles himself ‘Tho. Lovetrue’.
1796		Grose Classical Dict. of the Vulgar Tongue (3rd edn) n.p.: Lumping. Great. A lumping penny worth; a great quantity for the money, a bargain. He has got a lumping penny-worth; frequently said of a man who marries a fat woman.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 115: ‘Here they are, lumping penn’orths,’ of fruit at the stalls.
1831		London Standard 9 June 4/1: The King has a lumping pennyworth in him.
1844		Morn. Post (London) 24 Dec. 3/4: Never was there such a lumping four-pennyworth.
1846		London Dly News 15 Apr. 4/2: Justice — awful maid! [...] sells a lumping pennyweroth to an amateur ruffian who has money enough to buy luxury.
[1856		H. Mayhew Great World of London I 47: The corduroy proprietor pauses to turn round, and roar, ‘Sixteen a penny, lumping pears!’].
1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor I 29/1: The whelk-man peppers his lots, and shouts, ‘A lumping penn’orth for a ha’penny.’.
1887		Manchester Eve. News 31/ Mar.2/3: Acquittals by French juries in trials for murder [...] are now so frequent [that] I shall not have long to wait to gather a lumping pennyworth.