"meat grinder" meaning in English

{
  "forms": [
    {
      "form": "meat grinders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "meat grinder (plural meat grinders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "meatgrinder"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012, Caspar Henderson, The Book of Barely Imagined Beings, page 195",
          "text": "Watching the baby Leatherbacks going like the blazes for the black waters where the majority of them would be eaten by other animals before they grew any bigger than a child's fist, and where most of the survivors would probably be chewed up in the meat grinder of human civilization.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of meatgrinder"
      ],
      "id": "en-meat_grinder-en-noun-vAz-vHYp",
      "links": [
        [
          "meatgrinder",
          "meatgrinder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "meat grinder"
}

{
  "forms": [
    {
      "form": "meat grinders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "meat grinder (plural meat grinders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "meatgrinder"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2012, Caspar Henderson, The Book of Barely Imagined Beings, page 195",
          "text": "Watching the baby Leatherbacks going like the blazes for the black waters where the majority of them would be eaten by other animals before they grew any bigger than a child's fist, and where most of the survivors would probably be chewed up in the meat grinder of human civilization.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of meatgrinder"
      ],
      "links": [
        [
          "meatgrinder",
          "meatgrinder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "meat grinder"
}