"gnat's ass" meaning in English

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      "expansion": "gnat's ass",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "American English",
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      "examples": [
        {
          "ref": "1951, Herbert Halpert, “A Pattern of Proverbial Exaggeration from West Kentucky”, in Midwest Folklore:",
          "text": "He is so short he could stand flat-footed and kiss a gnat's ass without bending his knees.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of gnat's (“very tiny thing or distance”)"
      ],
      "id": "en-gnat's_ass-en-noun-Q2avGOQ6",
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      "raw_glosses": [
        "(slang, vulgar, Canada, US) Synonym of gnat's (“very tiny thing or distance”)"
      ],
      "synonyms": [
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          "extra": "very tiny thing or distance",
          "tags": [
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          "word": "gnat's"
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  "word": "gnat's ass"
}

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      "expansion": "gnat's ass",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1951, Herbert Halpert, “A Pattern of Proverbial Exaggeration from West Kentucky”, in Midwest Folklore:",
          "text": "He is so short he could stand flat-footed and kiss a gnat's ass without bending his knees.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of gnat's (“very tiny thing or distance”)"
      ],
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        "(slang, vulgar, Canada, US) Synonym of gnat's (“very tiny thing or distance”)"
      ],
      "synonyms": [
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  "word": "gnat's ass"
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