"up and under" meaning in English

{
  "forms": [
    {
      "form": "up and unders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "up and under (plural up and unders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English coordinated pairs",
          "parents": [
            "Coordinated pairs",
            "Terms by etymology"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sports",
          "orig": "en:Sports",
          "parents": [
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A long punt."
      ],
      "id": "en-up_and_under-en-noun-Sjtbbyc-",
      "links": [
        [
          "sports",
          "sports"
        ],
        [
          "punt",
          "punt"
        ]
      ],
      "raw_glosses": [
        "(sports) A long punt."
      ],
      "synonyms": [
        {
          "word": "garryowen"
        }
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "up and under"
}

{
  "forms": [
    {
      "form": "up and unders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "up and under (plural up and unders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English coordinated pairs",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Sports"
      ],
      "glosses": [
        "A long punt."
      ],
      "links": [
        [
          "sports",
          "sports"
        ],
        [
          "punt",
          "punt"
        ]
      ],
      "raw_glosses": [
        "(sports) A long punt."
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "garryowen"
    }
  ],
  "word": "up and under"
}