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]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "froufrou":
   bravery, chiffon, clinquant, festoons, finery, folderol, foofaraw,
   frilliness, frilling, frills, frills and furbelows, frippery, fuss,
   gaiety, gaudery, gilding, gilt, gingerbread, paste, pinchbeck,
   rustle, rustling, superfluity, tinsel, trappings, trickery,
   trumpery