"stiff as a board" meaning in English

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      "expansion": "stiff as a board (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
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          "name": "English entries with incorrect language header",
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      "examples": [
        {
          "ref": "1858, The London Lancet, page 408:",
          "text": "The rigidity of the corpse was excessive; after about two hours and a half it was stiff as a board.",
          "type": "quote"
        },
        {
          "ref": "1981 December 12, Andrea F. Loewenstein, “Gay Theatre Verité”, in Gay Community News, volume 9, number 21, page 10:",
          "text": "His stiff-as-a-board tranditionally ^([sic]) masculine good looks and constrained, stiff-upper lipped portrayal of Ed was a wonderful contrast to Fierstein's androgonous ^([sic]), physically mobile Arnold.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very stiff."
      ],
      "id": "en-stiff_as_a_board-en-adj-5LkgTiYd",
      "links": [
        [
          "stiff",
          "stiff"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very stiff."
      ],
      "tags": [
        "not-comparable"
      ]
    }
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  "word": "stiff as a board"
}

{
  "head_templates": [
    {
      "args": {
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      "expansion": "stiff as a board (not comparable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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        "English uncomparable adjectives",
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      "examples": [
        {
          "ref": "1858, The London Lancet, page 408:",
          "text": "The rigidity of the corpse was excessive; after about two hours and a half it was stiff as a board.",
          "type": "quote"
        },
        {
          "ref": "1981 December 12, Andrea F. Loewenstein, “Gay Theatre Verité”, in Gay Community News, volume 9, number 21, page 10:",
          "text": "His stiff-as-a-board tranditionally ^([sic]) masculine good looks and constrained, stiff-upper lipped portrayal of Ed was a wonderful contrast to Fierstein's androgonous ^([sic]), physically mobile Arnold.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very stiff."
      ],
      "links": [
        [
          "stiff",
          "stiff"
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      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very stiff."
      ],
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        "not-comparable"
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  "word": "stiff as a board"
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