"get-go" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "get",
        "3": "go"
      },
      "expansion": "get + go",
      "name": "compound"
    }
  ],
  "etymology_text": "From get + go. First use appears in 1960 as part of the phrase from the get-go in the publication Baltimore Afro-American.",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "get-go",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "the get-go"
        }
      ],
      "glosses": [
        "The beginning."
      ],
      "id": "en-get-go-en-noun-hTKbExOo",
      "links": [
        [
          "beginning",
          "beginning"
        ]
      ],
      "raw_glosses": [
        "(colloquial) The beginning."
      ],
      "synonyms": [
        {
          "word": "go-off"
        },
        {
          "word": "getgo"
        },
        {
          "word": "git-go"
        }
      ],
      "tags": [
        "colloquial"
      ],
      "wikipedia": [
        "Baltimore Afro-American"
      ]
    }
  ],
  "word": "get-go"
}

{
  "derived": [
    {
      "word": "the get-go"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "get",
        "3": "go"
      },
      "expansion": "get + go",
      "name": "compound"
    }
  ],
  "etymology_text": "From get + go. First use appears in 1960 as part of the phrase from the get-go in the publication Baltimore Afro-American.",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "get-go",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English colloquialisms",
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "The beginning."
      ],
      "links": [
        [
          "beginning",
          "beginning"
        ]
      ],
      "raw_glosses": [
        "(colloquial) The beginning."
      ],
      "tags": [
        "colloquial"
      ],
      "wikipedia": [
        "Baltimore Afro-American"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "go-off"
    },
    {
      "word": "getgo"
    },
    {
      "word": "git-go"
    }
  ],
  "word": "get-go"
}