Source : Webster's Revised Unabridged Dictionary (1913)

Fishy \Fish"y\, a.
   1. Consisting of fish; fishlike; having the qualities or
      taste of fish; abounding in fish. --Pope.

   2. Extravagant, like some stories about catching fish;
      improbable; also, rank or foul. [Colloq.]

Source : WordNet®

fishy
     adj : not as expected; "there was something fishy about the
           accident"; "up to some funny business"; "some
           definitely queer goings-on"; "a shady deal"; "her
           motives were suspect"; "suspicious behavior" [syn: {funny},
            {queer}, {shady}, {suspect}, {suspicious}]
     [also: {fishiest}, {fishier}]