1. to deal with a difficult situation in a very direct or confident way; to confront a problem head-on and deal with it openly

1. She decided to take the bull by the horns and try to solve the problem without any further delay.

2. It’s time to take the bull by the horns and get this job done.

3. Why don't you take the bull by the horns and tell him to leave?

4. I took the bull by the horns and confronted him about his mistreatment of the workers.