Green’s Dictionary of Slang

(UK Und.) a ditch.

1612		Dekker ‘Canting Song’ O per se O O1: To mill each Ken, let Cove bring then, / through Ruffmans Jauge or Laund.
1648		Dekker ‘Canters Dict.’ Eng. Villainies (9th edn) n.p.: Jague, a Ditch.
1665		Head Eng. Rogue I 50: Jague, A Ditch.
1674		Head Canting Academy (2nd edn).
1688		R. Holme Academy of Armory Ch. iii item 68c: Canting Terms used by Beggars, Vagabonds, Cheaters, Cripples and Bedlams. [...] Jague, a Ditch.
c.1698		B.E. Dict. Canting Crew n.p.: Jague A Ditch.
1707		J. Shirley Triumph of Wit 196: [as cit. 1612].
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1754		Scoundrel’s Dict. 17: Ditch – Jague.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum.