"second guesser" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "second guess",
        "3": "er"
      },
      "expansion": "second guess + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From second guess + -er.",
  "forms": [
    {
      "form": "second guessers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
      },
      "expansion": "second guesser (plural second guessers)",
      "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 terms suffixed with -er",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1988 October, George Vass, “World Series: A Magnet for the Second-Guessers”, in Baseball Digest, volume 47, number 10, Lakeside Publishing Company, ISSN 0005-609X, page 21",
          "text": "Such a change of heart in MacPhail, or any other second guesser, is unlikely."
        }
      ],
      "glosses": [
        "A person who second guesses."
      ],
      "id": "en-second_guesser-en-noun-uE8K3Aab",
      "links": [
        [
          "second guess",
          "second guess"
        ]
      ]
    }
  ],
  "word": "second guesser"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "second guess",
        "3": "er"
      },
      "expansion": "second guess + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From second guess + -er.",
  "forms": [
    {
      "form": "second guessers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
      },
      "expansion": "second guesser (plural second guessers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms suffixed with -er",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1988 October, George Vass, “World Series: A Magnet for the Second-Guessers”, in Baseball Digest, volume 47, number 10, Lakeside Publishing Company, ISSN 0005-609X, page 21",
          "text": "Such a change of heart in MacPhail, or any other second guesser, is unlikely."
        }
      ],
      "glosses": [
        "A person who second guesses."
      ],
      "links": [
        [
          "second guess",
          "second guess"
        ]
      ]
    }
  ],
  "word": "second guesser"
}