"bug boy" meaning in English

{
  "etymology_text": "From the \"bug\" (asterisk) used to denote their weight allowance.",
  "forms": [
    {
      "form": "bug boys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bug boy (plural bug boys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Athletes",
          "orig": "en:Athletes",
          "parents": [
            "Occupations",
            "Sports",
            "People",
            "Work",
            "Human activity",
            "Human",
            "Human behaviour",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Horse racing",
          "orig": "en:Horse racing",
          "parents": [
            "Equestrianism",
            "Horses",
            "Sports",
            "Equids",
            "Livestock",
            "Human activity",
            "Odd-toed ungulates",
            "Agriculture",
            "Animals",
            "Human behaviour",
            "Mammals",
            "Applied sciences",
            "Lifeforms",
            "Human",
            "Vertebrates",
            "Sciences",
            "All topics",
            "Life",
            "Chordates",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An apprentice jockey."
      ],
      "id": "en-bug_boy-en-noun-IHf39L5b",
      "links": [
        [
          "apprentice",
          "apprentice"
        ],
        [
          "jockey",
          "jockey"
        ]
      ],
      "raw_glosses": [
        "(US, slang) An apprentice jockey."
      ],
      "tags": [
        "US",
        "slang"
      ]
    }
  ],
  "word": "bug boy"
}

{
  "etymology_text": "From the \"bug\" (asterisk) used to denote their weight allowance.",
  "forms": [
    {
      "form": "bug boys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bug boy (plural bug boys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with non-redundant non-automated sortkeys",
        "en:Athletes",
        "en:Horse racing",
        "en:People"
      ],
      "glosses": [
        "An apprentice jockey."
      ],
      "links": [
        [
          "apprentice",
          "apprentice"
        ],
        [
          "jockey",
          "jockey"
        ]
      ],
      "raw_glosses": [
        "(US, slang) An apprentice jockey."
      ],
      "tags": [
        "US",
        "slang"
      ]
    }
  ],
  "word": "bug boy"
}