whistle in the dark

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

silbar en la oscuridad, hacer de tripas corazón

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.
Solo estaba silbando en la oscuridad, tratando de convencerse de que todo estaría bien.
Despite his brave words, I could tell he was just whistling in the dark about the company's future.
A pesar de sus valientes palabras, pude darme cuenta de que solo estaba silbando en la oscuridad sobre el futuro de la empresa.