CRAMP-WORDS,
Sentence of Death passed upon a Criminal by the Judge: as, He has just undergone the Cramp-Word; i.e. Sentence is just passed upon him.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Cramp Words in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).