fishy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Resembling or suggestive of fish, as in taste or odor.
• adjective Cold or expressionless.
• adjective Informal Inspiring doubt or suspicion.

from The Century Dictionary.

• Abounding in fish; inhabited by fish: as, the fishy flood.
• Like fish; having a fish-like quality: as, a fishy taste or smell.
• Extravagant, as a story; dubious or incredible, like many stories told about fishing and fishes. Compare fish-story.
• Dull and expressionless, like the eye of a fish.
• Equivocal, unsafe, or unsound, as a speculation or a course of conduct: as, a fishy venture.
• Plucky; brave; sturdy and enduring; thorough and faithful in duty: as, fishy to the backbone; a fishy man.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Consisting of fish; fishlike; having the qualities or taste of fish; abounding in fish.
• adjective colloq. Extravagant, like some stories about catching fish; improbable; also, rank or foul.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun childish Diminutive of fish
• adjective Of, from, or similar to fish.
• adjective Suspicious; inspiring doubt.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective of or relating to or resembling fish
• adjective not as expected