hash vs knacker's yard

hash

noun
  • Food, especially meat and potatoes, chopped and mixed together. 

  • The # symbol (octothorpe, pound). 

  • A hash run. 

  • A new mixture of old material; a second preparation or exhibition; a rehashing. 

  • A stupid fellow. 

  • One guess made by a mining computer in the effort of finding the correct answer which releases the next unit of cryptocurrency; see also hashrate. 

  • A confused mess. 

  • The result generated by a hash function. 

  • Hashish, a drug derived from the cannabis plant. 

verb
  • To chop into small pieces, to make into a hash. 

  • To transform according to a hash function. 

  • To make a quick, rough version. 

  • To make a mess of (something); to ruin. 

knacker's yard

noun
  • The area of a slaughterhouse where carcasses unfit for human consumption or other purposes are rendered down to produce useful materials such as glue. 

  • A (notional) place to send a person or object that is spent beyond all reasonable use. 

How often have the words hash and knacker's yard occurred in a corpus of books? (source: Google Ngram Viewer )