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One slice upon the other. John and his maid were caught lying bread and butter fashion.—To quarrel with one’s bread and butter; to act contrary to one’s interest. To know on which side one’s bread is buttered; to know one’s interest, or what is best for one. It is no bread and butter of mine; I have no business with it; or rather, I won’t intermeddle, because I shall get nothing by it.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Brazen-faced * Break-teeth WordsNathan 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.