swing for the fences

/S W IH1 NG F AO0 R DH AH0 F EH0 N S AH0 Z/
verb
  1. 1

    To swing at the ball as hard as possible, with the aim of getting a home run, increasing the chance of missing the ball.

    โ€œDon't swing for the fences unless it's an easy ball; be content with running part way.โ€

  2. 2

    To do something extremely ambitious, especially rashly.

    โ€œI'm not going to swing for the fences tomorrow, but I'm hoping my speech will be warmly received.โ€

Source: https://en.wiktionary.org/wiki/swing%20for%20the%20fences