QUOD,
Newgate; also a Prison, tho' generally for Debt. The Poor Dabs in the Quod. the poor Rogue is in Limbo.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Quod in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).