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.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Lumpers * LunNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes