a giddy, playful girl.
Archaic. a lascivious woman.
Origin of giglet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"lewd, wanton woman" (mid-14c.); later "a giddy, romping girl;" of unknown origin; cf. gig (n.1).
Online Etymology Dictionary, © 2010 Douglas Harper