Green’s Dictionary of Slang

gig n.3

also gigg
[ety. unknown]

1. the nose.

[UK] ‘A Dialogue betwixt Tom and Dick’ in Rump Poems and Songs (1662) II 191: And yet if George don’t hum his Gigg.
[Ire]Head Canting Academy (2nd edn) 174: Gigg The Nose.
[UK]B.E. Dict. Canting Crew n.p.: Gig c. a Nose [...] Snichel the Gig, c. Fillip the Fellow on the Nose.
[UK]J. Shirley Triumph of Wit 194: Snatchel him on the Gigg [Fillip him on the Nose].
[UK]A. Smith Lives of Most Notorious Highway-men, etc. (1926) 206: Gig, nose. Smibel the gig, i.e., fillip the fellow on the nose.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Scoundrel’s Dict. 18: A Nose – Gigg.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]Duncombe New and Improved Flash Dict.
[US]Matsell Vocabulum.
[UK]E. de la Bédollière Londres et les Anglais 314/2: gigg, nez.
[US]Trumble Sl. Dict. (1890).

2. the mouth.

[UK]Key of Pierce Egan’s Trip to Ascot Races [printed panorama] [T]he slouched castor, the open breeches at the knees, the short jacket, the fogle loosely twisted round his squeeze, the large wedge broach, the long quartered shoe and silver buckles, the bit of myrtle in his gig, and the cut altogether of a ‘rolling kiddy’.
[UK]Egan Finish to the Adventures of Tom and Jerry (1889) 175: [as 1827].