put out to grass
Also, put out to pasture. Cause to retire, as in With mandatory retirement they put you out to grass at age 65, or She's not all that busy now that she's been put out to pasture. These idioms refer to farm animals sent to graze when they are no longer useful for other work.
Words nearby put out to grass
put our heads together,
put out,
put out feelers,
put out of business,
put out of one's mind,
put out to grass,
put over,
put paid to,
put right,
put someone away,
put someone down