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Go upright; a word used by shoemakers, taylors and their servants, when any money is given to make them drink, and signifies, Bring it all out in liquor, though the donor intended less, and expects change, or some of his money, to be returned. Three-penny upright. See Threepenny Upright.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Uppish * Upright ManNathan 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.