swing for the fences

listen to the pronunciation of swing for the fences
English - English
To swing at the ball as hard as possible, with the aim of getting a home run, increasing the chance of missing the ball

Don't swing for the fence unless it's an easy ball, be content with running part way.

To act in a way that might generate a very good result, but which also has a large chance of failing

I'm not going to swing for the fence tomorrow, but I'm hoping my speech will be warmly received.