The Collaborative International Dictionary
Giglot \Gig"lot\, Giglet \Gig"let\, n. [Cf. Icel. gikkr a pert, rude person, Dan. giek a fool, silly man, AS. gagol, g[ae]gl, lascivious, wanton, MHG. gogel wanton, giege fool, and E. gig a wanton person.] A wanton; a lascivious or light, giddy girl. [Obs.]
The giglet is willful, and is running upon her fate.
--Sir W.
Scott.
Giglot \Gig"lot\, a.
Giddi; light; inconstant; wanton. [Obs.] ``O giglot
fortune!''
--Shak.
Douglas Harper's Etymology Dictionary
"lewd, wanton woman" (mid-14c.); later "a giddy, romping girl;" of unknown origin; compare gig (n.1).
Wiktionary
a. (context obsolete English) giddy; inconstant; wanton n. (context obsolete English) A strumpet; a wanton girl.