jogue, n. — Green’s Dictionary of Slang

jogue n.

also jug

[the term survives in 20C+ market traders’ jargon joag]

(UK Und.) one shilling; thus five jogue, 5 shillings etc.

1812		Vaux Vocab. of the Flash Lang.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1937–84		Partridge DSUE (1984) 624: jogue. A shilling: c. from ca. 1810; in C.20 market-traders’ argot (as joag). It occurs in George Elson, The Last of the Climbing Boys, 1900, as jug.