"underclasser" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "underclass",
        "3": "er"
      },
      "expansion": "underclass + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From underclass + -er.",
  "forms": [
    {
      "form": "underclassers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underclasser (plural underclassers)",
      "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"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1988 January 22, Salim Muwakkil, “Pop: I'm Bad, Therfore I Am”, in Chicago Reader:",
          "text": "The national symbol for this new attitude is Bernhard Goetz, who was acquitted of attempted murder by a jury after admitting he shot four underclassers because he thought they meant him harm.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A member of an underclass"
      ],
      "id": "en-underclasser-en-noun-29S2SQD2",
      "links": [
        [
          "underclass",
          "underclass"
        ]
      ]
    }
  ],
  "word": "underclasser"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "underclass",
        "3": "er"
      },
      "expansion": "underclass + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "From underclass + -er.",
  "forms": [
    {
      "form": "underclassers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underclasser (plural underclassers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er",
        "English terms with quotations",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "ref": "1988 January 22, Salim Muwakkil, “Pop: I'm Bad, Therfore I Am”, in Chicago Reader:",
          "text": "The national symbol for this new attitude is Bernhard Goetz, who was acquitted of attempted murder by a jury after admitting he shot four underclassers because he thought they meant him harm.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A member of an underclass"
      ],
      "links": [
        [
          "underclass",
          "underclass"
        ]
      ]
    }
  ],
  "word": "underclasser"
}