blow the whistle on

US /bloʊ ðə ˈhwɪs.əl ɑn/
UK /bloʊ ðə ˈhwɪs.əl ɑn/
"blow the whistle on" picture
1.

denunciar, revelar, delatar

to inform on someone or something, especially to expose wrongdoing

:
An employee decided to blow the whistle on the company's illegal practices.
Um funcionário decidiu denunciar as práticas ilegais da empresa.
If you see any corruption, you should blow the whistle on it.
Se você vir alguma corrupção, deve denunciá-la.