FISHIEST
FISHY
fishy, funny, shady, suspect, suspicious
(adjective) 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”
fishy
(adjective) of or relating to or resembling fish; “the soup had a fishy smell”
Source: WordNet® 3.1
Adjective
fishiest
superlative form of fishy: most fishy
Source: Wiktionary
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: Webster’s Unabridged Dictionary 1913 Edition