"granny gear" meaning in English

{
  "etymology_text": "So called because elderly people might be expected to favour slower speeds.",
  "forms": [
    {
      "form": "granny gears",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "granny gear (plural granny gears)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Automotive",
          "orig": "en:Automotive",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The lowest gear on a vehicle."
      ],
      "id": "en-granny_gear-en-noun-WEEcMOOP",
      "links": [
        [
          "derogatory",
          "derogatory"
        ],
        [
          "low",
          "low"
        ],
        [
          "gear",
          "gear"
        ],
        [
          "vehicle",
          "vehicle"
        ]
      ],
      "raw_glosses": [
        "(informal, derogatory) The lowest gear on a vehicle."
      ],
      "tags": [
        "derogatory",
        "informal"
      ]
    }
  ],
  "word": "granny gear"
}

{
  "etymology_text": "So called because elderly people might be expected to favour slower speeds.",
  "forms": [
    {
      "form": "granny gears",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "granny gear (plural granny gears)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English derogatory terms",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Automotive"
      ],
      "glosses": [
        "The lowest gear on a vehicle."
      ],
      "links": [
        [
          "derogatory",
          "derogatory"
        ],
        [
          "low",
          "low"
        ],
        [
          "gear",
          "gear"
        ],
        [
          "vehicle",
          "vehicle"
        ]
      ],
      "raw_glosses": [
        "(informal, derogatory) The lowest gear on a vehicle."
      ],
      "tags": [
        "derogatory",
        "informal"
      ]
    }
  ],
  "word": "granny gear"
}