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

1.
membongkar, mendedahkan, melaporkan
to inform on someone or something, especially to expose wrongdoing
:
•
An employee decided to blow the whistle on the company's illegal practices.
Seorang pekerja memutuskan untuk membongkar amalan haram syarikat itu.
•
If you see any corruption, you should blow the whistle on it.
Jika anda melihat sebarang rasuah, anda harus membongkarkannya.