"smooth brain" meaning in English

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        "2": "smooth-brained"
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      "expansion": "Nominalization of smooth-brained",
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  "etymology_text": "Nominalization of smooth-brained, possibly by reference to lissencephaly (a brain abnormality, usually resulting in severe developmental delay, characterized by the surface of the brain being smooth), or simply by reference to the human brain typically being wrinkly.",
  "forms": [
    {
      "form": "smooth brains",
      "tags": [
        "plural"
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      "args": {},
      "expansion": "smooth brain (plural smooth brains)",
      "name": "en-noun"
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        "2": "derogatory",
        "3": "offensive"
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      "expansion": "(derogatory, offensive)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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    {
      "categories": [],
      "examples": [
        {
          "text": "I could not have made it easier for you smooth brains, yet you still messed up!",
          "type": "example"
        }
      ],
      "glosses": [
        "A stupid person."
      ],
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          "stupid",
          "stupid"
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      "glosses": [
        "Used other than figuratively or idiomatically: see smooth, brain."
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      "links": [
        [
          "smooth",
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          "brain",
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          "word": "smoothbrain"
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        "derogatory",
        "offensive"
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  ],
  "word": "smooth brain"
}

{
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    "English nouns",
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  "etymology_templates": [
    {
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        "2": "smooth-brained"
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      "expansion": "Nominalization of smooth-brained",
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  ],
  "etymology_text": "Nominalization of smooth-brained, possibly by reference to lissencephaly (a brain abnormality, usually resulting in severe developmental delay, characterized by the surface of the brain being smooth), or simply by reference to the human brain typically being wrinkly.",
  "forms": [
    {
      "form": "smooth brains",
      "tags": [
        "plural"
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    {
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      "expansion": "smooth brain (plural smooth brains)",
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  "lang_code": "en",
  "pos": "noun",
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        {
          "text": "I could not have made it easier for you smooth brains, yet you still messed up!",
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      "glosses": [
        "A stupid person."
      ],
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          "stupid",
          "stupid"
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        "derogatory",
        "offensive"
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    {
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        "Used other than figuratively or idiomatically: see smooth, brain."
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  "synonyms": [
    {
      "word": "smoothbrain"
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  "word": "smooth brain"
}