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The jump, or dining-room jump; a species of robbery effected by ascending a ladder placed by a sham lamp-lighter, against the house intended to be robbed. It is so called, because, should the lamp-lighter be put to flight, the thief who ascended the ladder has no means of escaping but that of jumping down.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Jumblegut Lane * JumpersNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes
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Francis Grose was independently wealthy, having inherited money from his father, a jeweller. Finding himself overspending, he published a number of books; his Provincial Glossary seems to have been the starting-point for the Vulgar Tongue reproduced here.