Green’s Dictionary of Slang

fizgig n.1

[ext. of SE gig, a flighty young woman; despite logical imagery of fizz n.1 (2), i.e. one who fizzes (with animal spirits) the chronology renders this impossible]

a promiscuous woman.

[UK]Skelton Elynour Rummynge line 538: Than sterte forth a fysgygge And she brought a bore pygge.
[UK]T. Tusser Five Hundred Pointes of Good Husbandrie (1878) 169: Make maide to be clenly, or make her crie creake, and teach hir to stirre, when hir mistresse doths speake. Let hollie wand threate, Let Fisgig be beate.
[UK]S. Gosson Pleasant quippes for upstart newfangled gentlewomen 13: For when you looke for praises sound, / Then are you for light fisgiggs crownd.
[UK]D. Boucicault London Assurance in London Assurance and other Victorian Comedies (2001) Act III: Fizgig! The devil!