A short thick man or woman. Norfolk dumplin; a jeering appellation of a Norfolk man, dumplins being a favourite kind of food in that county.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Dummee * DumpsNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes