blow the whistle on

Significado

to tell people in authority about something wrong that someone is doing

Denunciar às autoridades algo errado que alguém está fazendo.

Exemplos

1. 1A nurse blew the whistle on the hospital's poor hygiene, and inspectors arrived the next day.
2. 2It takes courage to blow the whistle on your own employer.
3. 3An accountant blew the whistle on the charity after noticing that donations were disappearing.
4. 4If you see a colleague stealing, you should blow the whistle on them.
5. 5Who blew the whistle on the factory's illegal dumping? The newspaper won't say.

Gramática

Só blow muda: blows, blowing, blew, blown. A pessoa ou a organização vem depois de on.