giglet :- A lewd, wanton girl.

The etymology is murky. The 1st ed. OED doesn'tr really even hazard a guess. But other sources (the cautious AHD ventures 'perhaps') link giglet with Italian gigolo, French gigue 'violin; dance' (whence our jig) also linked with gigot 'leg of mutton'. Legs leads to dancing woman and prostitutes. Middle English also had gigletry 'lasciviousness'.