ring the curtain down
ring the curtain down(on something) and bring the curtain down (on something)
1. Fig. to lower a theater curtain, usually at the end of an act or a play. (More literal than .) After one hundred performances, it's time to ring the curtain down on our show for the last time. As we bring down the curtain on another successful performance, let's be thankful nothing serious went wrong.
2. Fig. to bring something to an end; to declare something to be at an end. It's time to ring the curtain down on our relationship. We have nothing in common anymore. We've tried our best to make this company a success, but it's time to ring down the curtain.