The name of the finisher of the law, or hangman about the year 1608.--'For he rides his circuit with the Devil, and Derrick must be his host, and Tiburne the inne at which he will lighte.' Vide Bellman of London, in art. PRIGGIN LAW.--'At the gallows, where I leave them, as to the haven at which they must all cast anchor, if Derrick's cables do but hold.' Ibid.
Meaning of DERRICK in English
Slang English vocab. Английский сленговый словарь. 2012