Green’s Dictionary of Slang

crapping n.¹

(UK Und.) hanging.

1789

G. Parker Life’s Painter 138: Let’s have a chaunt, and no more jaw about crapping.

In compounds

crapping cull (n.) [cull n.¹ (4); cits. 1835, 1846 are mispr.]

(UK Und.) the hangman.

1753		J. Poulter Discoveries (1774) 42: A Rispin and a craping Cull; a Bridewell and a Hangman.
1758		Oxford Jrnl 15 Apr. 2/1: Simon Jones, the Executioner [...] was robbed [...] of near four Pounds in Money by three fellows [...] The left him asleep at an Alehouse [...] and told the People of the House ‘That they had scamped the Crapping Cull’.
a.1790		H.T. Potter New Dict. Cant (1795).
1809		G. Andrewes Dict. Sl. and Cant.
1835		G. Kent Modern Flash Dict. 11: Craping curl – an executioner.
1846		Swell’s Night Guide 117/1: Crapping curl, an executioner.
1859		Matsell Vocabulum 22: cramping [sic] cull. Executioner; hangman.