knacker's yard

Meanings

1. The area of a slaughterhouse where carcasses unfit for human consumption or other purposes are rendered down to produce useful materials such as glue.
2. A (notional) place to send a person or object that is spent beyond all reasonable use.

Etymology

From knacker (“one who slaughters and (especially) renders worn-out livestock (especially horses) and sells their flesh, bones and hides”) + -'s + yard.