The Collaborative International Dictionary of English v.0.48:

Fie \Fie\, interj. [OE. fi; cf. D. fif. G. pfui, Icel. f?, Sw. &
   Dan. fy, F. fi, L. fi, phy.]
   An exclamation denoting contempt or dislike. See Fy.
   --Fuller.
   [1913 Webster]