All of these words we could use to express our lack of trust. We use them to say that something is unreliable, dubious or untrustworthy.
"Listen to this -A beautiful, 4 bedroom house in the mountains. Price 50,000"
"That seems fishy (dodgy, iffy)"
This post cannot really be trusted. The offer looks too good to be true so there must be some catch.
They got involved with a dodgy businessman and lost all their savings.
Listen! There’s something fishy going on.
The milk smells a bit iffy.