"OG" meaning in Japanese

{
  "forms": [
    {
      "form": "OG",
      "ruby": [
        [
          "OG",
          "オージー"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ōjī",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "オージー"
      },
      "expansion": "OG(オージー) • (ōjī)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "alt": "ōbī",
          "ruby": [
            [
              "O",
              "オー"
            ],
            [
              "B",
              "ビー"
            ]
          ],
          "word": "OB"
        }
      ],
      "glosses": [
        "female graduate (\"old girl\")"
      ],
      "id": "en-OG-ja-noun-djF4OPd6",
      "links": [
        [
          "graduate",
          "graduate"
        ]
      ],
      "synonyms": [
        {
          "roman": "sotsugyōsei",
          "ruby": [
            [
              "卒業生",
              "そつぎょうせい"
            ]
          ],
          "word": "卒業生"
        }
      ]
    }
  ],
  "word": "OG"
}

{
  "coordinate_terms": [
    {
      "alt": "ōbī",
      "ruby": [
        [
          "O",
          "オー"
        ],
        [
          "B",
          "ビー"
        ]
      ],
      "word": "OB"
    }
  ],
  "forms": [
    {
      "form": "OG",
      "ruby": [
        [
          "OG",
          "オージー"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ōjī",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "オージー"
      },
      "expansion": "OG(オージー) • (ōjī)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms with redundant sortkeys",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "female graduate (\"old girl\")"
      ],
      "links": [
        [
          "graduate",
          "graduate"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "sotsugyōsei",
      "ruby": [
        [
          "卒業生",
          "そつぎょうせい"
        ]
      ],
      "word": "卒業生"
    }
  ],
  "word": "OG"
}