"thumb wrestler" meaning in English

{
  "etymology_links": [
    [
      "thumb wrestle",
      "thumb wrestle#English"
    ],
    [
      "-er",
      "-er#English"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thumb wrestle",
        "3": "-er"
      },
      "expansion": "thumb wrestle + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From thumb wrestle + -er",
  "forms": [
    {
      "form": "thumb wrestlers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+"
      },
      "expansion": "thumb wrestler (plural thumb wrestlers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "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"
        }
      ],
      "glosses": [
        "One who participates in thumb wars."
      ],
      "id": "en-thumb_wrestler-en-noun-ZqWsLQgD",
      "links": [
        [
          "thumb war",
          "thumb war"
        ]
      ]
    }
  ],
  "word": "thumb wrestler"
}

{
  "etymology_links": [
    [
      "thumb wrestle",
      "thumb wrestle#English"
    ],
    [
      "-er",
      "-er#English"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thumb wrestle",
        "3": "-er"
      },
      "expansion": "thumb wrestle + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From thumb wrestle + -er",
  "forms": [
    {
      "form": "thumb wrestlers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+"
      },
      "expansion": "thumb wrestler (plural thumb wrestlers)",
      "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"
      ],
      "glosses": [
        "One who participates in thumb wars."
      ],
      "links": [
        [
          "thumb war",
          "thumb war"
        ]
      ]
    }
  ],
  "word": "thumb wrestler"
}