Idiom of the day :- Whistle in the dark

Usage, examples and definition of the Idiom :-

To whistle in the dark means (1) to guess wildly about something or (2) to keep up your courage. ‘I don’t know when the last bus leaves the terminal,’ Douglas said, ‘ so I’d be whistling in the dark if I said it was at midnight. During the terrible storm, we sat inside the house whistling in the dark hoping it would quickly pass.’