What does the idiom 'something is fishy' mean?

Answer:
Fishy means suspicious. The image is of you smelling a strong odor -- you can sense that something is there, but you can't see it yet.


Example:


You get an email saying some guy in Nigeria will send you a fortune if you send him money first. You say "There's something fishy about this!"
First answer by ID3707073777. Last edit by Darksyde. Contributor trust: 1167 [recommend contributor recommended]. Question popularity: 17 [recommend question].