be whistling in the dark

to be confident that something good will happen when it is not at all likely She seems pretty sure she'll win the title, but she may just be whistling in the dark.

Common Names:

Name	Pronounced	Usage
Donata	do-NAH-tah (Italian)	Italian, Late Roman
FionnÁN	-	Irish
Cory	KAWR-ee	English
FlÓRa	-	Hungarian
Drousilla	-	Biblical Greek
Vickers	['vikəz]