Green’s Dictionary of Slang

1. (also gigg) the female genitals.

1655		Gossips Braule 6: Go go, to Tower-Hill, and get your Gun scour’d ye Jade; I never was the Hang-mans Whore yet, nor had the Brewer come home with me to tip my Gigg five times in a day.
1672		J. Phillips Maronides (1678) VI 84: I loud snoaring like a Pigg, / Weary with humming her black guigg.
c.1698		B.E. Dict. Canting Crew n.p.: Gig [...] a Woman’s Privities.
a.1700		‘Penitent Gallant’ in Pepys Ballads (1987) IV 138: A Jocular Spark, who Rambl’d and Revel’d at pleasure, Young Women he would often kiss in the dark, and tickle their Giggs.
1719		in D’Urfey Pills to Purge Melancholy V 109: And then I went to her, resolving to try her; / I put her agog of a longing desire; / I told her I’d give her a Whip for her Gig, / And a Scourge to the Tune of the Irish Jigg.
1721		Penkethman’s Jests 107: Here lies Anne, Mary, and Elizabeth Briggs, / And here also is honest HUMPHRY, who humm’d all their Giggs.
1731		Beau’s Misc. 55: Here lies Sarah, Mary, and Elizabeth Briggs, And Humphry their Husband, who hum’d all their Gigs.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Gigg [...] a woman’s privities.
1790		‘Rutland’s Gig’ in Rutland’s Gig 5: And A--n D--h has promised his rib, / That he for the future will drive her Gig: / Since driving is her delight, / From morning until night, / She says, my dear, drive right, / As you know my Gig is tight.
1811		Lex. Balatronicum.
1890–1904		Farmer & Henley Sl. and Its Analogues.
c.1904		A. Crowley Snowdrops from a Curate’s Garden 19: I might find it hard to explain the lady’s respiratory apparatus, but she could hardly account for the condition of her gigg and gut-end.
1972		R.A. Wilson Playboy’s Book of Forbidden Words.
1982		Maledicta VI:1+2 (Summer/Winter) 131: Vagina […] gig.

2. a term of disparagement.

1796		T. Morton Way to Get Married in Inchbold (1808) XXV 10: My old gig of a father wore a velvet night-cap in his counting house – what a vile bore, ha! ha! [Ibid.] 13: What a superlative gig it [i.e. an old man] is.
1856		G.J. Whyte-Melville Kate Coventry (1865) 149: Such a set of ‘gigs,’ my dear, I never saw in my life; large, under-bred horses, and not a good-looking man among them.

3. (Aus., also gig ape) a fool, an idiot; thus gig-headed adj., foolish.

1929		L. Thomas Woodfill of the Regulars 125: You sure are, you— — gig-headed Norwegian.
1943		J. Devine Rats of Tobruk 31: We had a saying that any one who did anything so silly as to get caught by a booby trap was a ‘gig’.
1948		S.L. Elliott Rusty Bugles I iii: You stupid gig ape . . . what did you do that for?
1953		Baker Aus. Speaks.
1967		Kings Cross Whisper (Sydney) xxxvii. 6/1: You reckon you’re not the one who makes a gig of himself with a skinful of slops.
1977		R. Beilby Gunner 235: Blokes [...] making gigs of themselves all over the Middle East.
1984		W. Ammon et al. Working Lives 83: They’ll talk and they’ll laugh. ‘The gig,’ they’ll say. ‘The bloody, silly goat gig.’.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Gig. 2. A foolish person.
1998		P. Doyle (con. late 1950s) Amaze Your Friends (2019) 44: ‘It’s French.’ ‘Yeah? What would those gigs know?’.