merveilleuse

noun1

1. •
   (historical) A female merveilleux.

   • The ‘merveilleuse’ of the Directory in France. The ‘merveilleuse’, or ‘ultra-fashionable’, as the writer..rather inadequately translates her title, ‘walked..half naked in the Champs Elysees’. — 1892

noun1

1. •
   (historical) A fashionable young Frenchwoman of the late 18th-century, characterized by extravagant dress sense and anti-revolutionary ideas.

   • You are the reason I arrived indecently late at Madame de Volanges's and had all the old ladies thinking I was a Merveilleuse. — 2007