get on to somebody

Từ điển Oxford Advanced Learner 8th

ˌget ˈon to sb derived
1. to contact sb by telephone, letter or email
•The heating isn't working; I'll get on to the landlord about it.
2. to become aware of sb's activities, especially when they have been doing sth bad or illegal
•He had been stealing money from the company for years before they got on to him.
Main entry: ↑get_derived