"onliest" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
      },
      "expansion": "onliest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "I can't stand that bastard there...\nYou ain't the onliest one. I can't either."
        }
      ],
      "form_of": [
        {
          "extra": "most only, used to mean \"only\" but with added intensiveness or emphasis",
          "word": "only"
        }
      ],
      "glosses": [
        "superlative form of only: most only, used to mean \"only\" but with added intensiveness or emphasis."
      ],
      "id": "en-onliest-en-adj-gJh3IBLz",
      "links": [
        [
          "only",
          "only#English"
        ]
      ],
      "raw_glosses": [
        "(informal and dialectal) superlative form of only: most only, used to mean \"only\" but with added intensiveness or emphasis."
      ],
      "synonyms": [
        {
          "tags": [
            "African-American-Vernacular-English",
            "US",
            "especially"
          ],
          "word": "onlest"
        }
      ],
      "tags": [
        "dialectal",
        "form-of",
        "informal",
        "superlative"
      ]
    }
  ],
  "word": "onliest"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
      },
      "expansion": "onliest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English dialectal terms",
        "English entries with incorrect language header",
        "English informal terms",
        "English non-lemma forms",
        "English superlative adjectives"
      ],
      "examples": [
        {
          "text": "I can't stand that bastard there...\nYou ain't the onliest one. I can't either."
        }
      ],
      "form_of": [
        {
          "extra": "most only, used to mean \"only\" but with added intensiveness or emphasis",
          "word": "only"
        }
      ],
      "glosses": [
        "superlative form of only: most only, used to mean \"only\" but with added intensiveness or emphasis."
      ],
      "links": [
        [
          "only",
          "only#English"
        ]
      ],
      "raw_glosses": [
        "(informal and dialectal) superlative form of only: most only, used to mean \"only\" but with added intensiveness or emphasis."
      ],
      "tags": [
        "dialectal",
        "form-of",
        "informal",
        "superlative"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "African-American-Vernacular-English",
        "US",
        "especially"
      ],
      "word": "onlest"
    }
  ],
  "word": "onliest"
}