Meaning of "fishy"

[Litovsky]

English Language Tests, Intermediate level

ESL/EFL Test #201 "Idioms about Animals", question 6

The suave salesman looked nice but when he told us about the 0% financing, the deal seemed a little ..........

(a) fishy
(b) doggy
(c) foxy

English Language Tests, Intermediate level

ESL/EFL Test #201 "Idioms about Animals", answer 6

The suave salesman looked nice but when he told us about the 0% financing, the deal seemed a little fishy.

Correct answer: (a) fishy

Your answer was: incorrect
The suave salesman looked nice but when he told us about the 0% financing, the deal seemed a little foxy.
_________________________

what is the meaning of "fishy"

Litovsky

[Conchita]

If something if fishy, it is suspicious or odd:

his story seemed rather fishy to me.