jabot

from WordNet (r) 3.0 (2006)

jabot
    n 1: a ruffle on the front of a woman's blouse or a man's shirt

from The Collaborative International Dictionary of English v.0.48

Jabot \Jab"ot\, n. [F.]
   1. Originally, a kind of ruffle worn by men on the bosom of
      the shirt.
      [1913 Webster]

   2. An arrangement of lace or tulle, looped ornamentally, and
      worn by women on the front of the dress.
      [1913 Webster]