whistle in the dark

US /ˈhwɪs.əl ɪn ðə dɑːrk/
UK /ˈhwɪs.əl ɪn ðə dɑːrk/
"whistle in the dark" picture
1.

assobiar no escuro, fingir coragem

to try to make yourself feel more confident or less afraid by pretending to be brave or cheerful

:
He was just whistling in the dark, trying to convince himself that everything would be fine.
Ele estava apenas assobiando no escuro, tentando se convencer de que tudo ficaria bem.
Despite his brave words, I could tell he was just whistling in the dark about the company's future.
Apesar de suas palavras corajosas, eu podia dizer que ele estava apenas assobiando no escuro sobre o futuro da empresa.