scrapheap

noun3

1. •
   A pile in which junk is discarded.

   • By Easter, "Princess Royal" Pacifics Nos. 46211/2 were in the scrap line at Crewe works and Nos. 46204/5/7/10 were gathered at Crewe South shed, no doubt to follow to the scrapheap. — 1962
2. •
   A junkyard.
3. •
   (figurative) A collection of discarded or rejected items or ideas.