The Collaborative International Dictionary of English v.0.48:

Flirt-gill \Flirt"-gill`\, n.
   A woman of light behavior; a gill-flirt. [Obs.] --Shak.
   [1913 Webster]

         You heard him take me up like a flirt-gill. --Beau. &
                                                  Fl.
   [1913 Webster]