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

1.
揭发, 告发, 告密
to inform on someone or something, especially to expose wrongdoing
:
•
An employee decided to blow the whistle on the company's illegal practices.
一名员工决定揭发公司的非法行为。
•
If you see any corruption, you should blow the whistle on it.
如果你看到任何腐败,你应该揭发它。