go overboard

/G OW1 OW0 V ER0 B AO0 R D/
verb
  1. 1

    To fall out of a vessel.

    โ€œAttach the buoys so they don't go overboard.โ€

  2. 2

    To go too far; to exceed reasonable bounds.

    โ€œYou can decorate the new room, but don't go overboard with surreal paintings.โ€

Source: https://en.wiktionary.org/wiki/go%20overboard