The Collaborative International Dictionary of English v.0.48:

Froufrou \Frou"frou`\ (fr[=oo]"fr[=oo]`), n. [F., of imitative
   origin.]
   1. A rustling, esp. the rustling of a woman's dress.
      [1913 Webster]

   2. showy or frilly ornamentation. --MW10
      [PJC]