put out to grass

/P UH1 T AW0 T UW0 G R AE0 S/
verb
  1. 1

    To make someone retire, especially due to advancing age.

    โ€œThey've put John out to pasture and replaced him with someone who's got half his experience.โ€

  2. 2

    To discontinue something.

    โ€œThat version of the program has been put out to pasture.โ€

Source: https://en.wiktionary.org/wiki/put%20out%20to%20grass, https://en.wiktionary.org/wiki/put%20out%20to%20pasture