"one's elevator doesn't go all the way to the top" meaning in English

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      "expansion": "one's elevator doesn't go all the way to the top",
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      "_dis1": "50 50",
      "word": "not have both oars in the water"
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      "_dis1": "50 50",
      "word": "one brick short of a full load"
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      "_dis1": "50 50",
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      "glosses": [
        "Used as an indirect way to say that someone is mentally deficient."
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      "id": "en-one's_elevator_doesn't_go_all_the_way_to_the_top-en-phrase-iOcC46Up",
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      "raw_glosses": [
        "(US, humorous) Used as an indirect way to say that someone is mentally deficient."
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      "translations": [
        {
          "_dis1": "57 43",
          "code": "fi",
          "lang": "Finnish",
          "sense": "indicating mental deficiency",
          "word": "jollakin ei mene hissi ylös asti"
        },
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          "_dis1": "57 43",
          "code": "fi",
          "lang": "Finnish",
          "sense": "indicating mental deficiency",
          "word": "jollakin ei ole kaikki muumit laaksossa"
        },
        {
          "_dis1": "57 43",
          "code": "fr",
          "lang": "French",
          "sense": "indicating mental deficiency",
          "word": "il n’a pas la lumière à tous les étages"
        },
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          "_dis1": "57 43",
          "code": "pl",
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          "sense": "indicating mental deficiency",
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        "Used as an indirect way to say that someone is crazy."
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        "(humorous) Used as an indirect way to say that someone is crazy."
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  "synonyms": [
    {
      "_dis1": "50 50",
      "word": "one's elevator doesn't go all the way to the top floor"
    },
    {
      "_dis1": "50 50",
      "word": "one's elevator doesn't go to the top"
    },
    {
      "_dis1": "50 50",
      "word": "one's elevator doesn't go to the top floor"
    }
  ],
  "word": "one's elevator doesn't go all the way to the top"
}

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  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "full deckism"
    },
    {
      "word": "not have both oars in the water"
    },
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      "word": "one brick short of a full load"
    },
    {
      "word": "play with a full deck"
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        "(US, humorous) Used as an indirect way to say that someone is mentally deficient."
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  "synonyms": [
    {
      "word": "one's elevator doesn't go all the way to the top floor"
    },
    {
      "word": "one's elevator doesn't go to the top"
    },
    {
      "word": "one's elevator doesn't go to the top floor"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "indicating mental deficiency",
      "word": "jollakin ei mene hissi ylös asti"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "indicating mental deficiency",
      "word": "jollakin ei ole kaikki muumit laaksossa"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "indicating mental deficiency",
      "word": "il n’a pas la lumière à tous les étages"
    },
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      "code": "pl",
      "lang": "Polish",
      "sense": "indicating mental deficiency",
      "word": "nie mieć wszystkich w domu"
    }
  ],
  "word": "one's elevator doesn't go all the way to the top"
}