Francois said:
Cambridge dict said:
adjective
1 INFORMAL not certain or decided:
Simon's still kind of iffy about going to Columbia.
2 not completely good, honest or suitable:
The milk smells a bit iffy.
I was hoping to go to the park but the weather's looking a bit iffy.
I got the impression that meaning 2) is quite frequent, but what about meaning 1) ?
FRC
They are really not all that different. "Iffy" creates the notion that something is in the gray area, that it could go either way.
Simon hasn't made up his mind. He might go to Columbia; he might not.
The milk might be spoiled but it might be OK. The sniffere can;t really tell.
The weather might be OK, but it might get bad. The speaker doesn't really know.
Both meanings are used, but the word itself is not all that common. It is very informal, IMO.