"smart as paint" meaning in English

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      "expansion": "smart as paint (not comparable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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      "glosses": [
        "Very smart in appearance."
      ],
      "id": "en-smart_as_paint-en-adj-yRBqKSQ9",
      "links": [
        [
          "smart",
          "smart"
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      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very smart in appearance."
      ],
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        "not-comparable"
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          "ref": "1881–1882, Robert Louis Stevenson, Treasure Island, London; Paris: Cassell & Company, published 14 November 1883, →OCLC:",
          "text": "'But now, you look here: you're young, you are, but you're as smart as paint. I see that when I set my eyes on you, and I'll talk to you like a man.'",
          "type": "quote"
        },
        {
          "ref": "1918, Norman Lindsay, The Magic Pudding:",
          "text": "'You have to be as smart as paint to keep this Puddin' in order. He's that artful, lawyers couldn't manage him.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very intelligent."
      ],
      "id": "en-smart_as_paint-en-adj-Om7C9IFT",
      "links": [
        [
          "intelligent",
          "intelligent"
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      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very intelligent."
      ],
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        "not-comparable"
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  "word": "smart as paint"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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      "glosses": [
        "Very smart in appearance."
      ],
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          "smart",
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      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very smart in appearance."
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        "not-comparable"
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          "ref": "1881–1882, Robert Louis Stevenson, Treasure Island, London; Paris: Cassell & Company, published 14 November 1883, →OCLC:",
          "text": "'But now, you look here: you're young, you are, but you're as smart as paint. I see that when I set my eyes on you, and I'll talk to you like a man.'",
          "type": "quote"
        },
        {
          "ref": "1918, Norman Lindsay, The Magic Pudding:",
          "text": "'You have to be as smart as paint to keep this Puddin' in order. He's that artful, lawyers couldn't manage him.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very intelligent."
      ],
      "links": [
        [
          "intelligent",
          "intelligent"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very intelligent."
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