"smooth brain" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "smooth-brained"
      },
      "expansion": "Nominalization of smooth-brained",
      "name": "nom"
    }
  ],
  "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"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "smooth brain (plural smooth brains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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."
      ],
      "id": "en-smooth_brain-en-noun-NdWfaHUB",
      "links": [
        [
          "stupid",
          "stupid"
        ]
      ],
      "tags": [
        "derogatory",
        "offensive"
      ]
    },
    {
      "categories": [
        {
          "_dis": "16 84",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "5 95",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Used other than figuratively or idiomatically: see smooth, brain."
      ],
      "id": "en-smooth_brain-en-noun-ltjbs6CV",
      "links": [
        [
          "smooth",
          "smooth#English"
        ],
        [
          "brain",
          "brain#English"
        ]
      ],
      "synonyms": [
        {
          "_dis1": "0 100",
          "word": "smoothbrain"
        }
      ],
      "tags": [
        "derogatory",
        "offensive"
      ]
    }
  ],
  "word": "smooth brain"
}

{
  "categories": [
    "English countable nouns",
    "English derogatory terms",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English offensive terms",
    "Pages with 1 entry",
    "Pages with entries",
    "en:People"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "smooth-brained"
      },
      "expansion": "Nominalization of smooth-brained",
      "name": "nom"
    }
  ],
  "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"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "smooth brain (plural smooth brains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "I could not have made it easier for you smooth brains, yet you still messed up!",
          "type": "example"
        }
      ],
      "glosses": [
        "A stupid person."
      ],
      "links": [
        [
          "stupid",
          "stupid"
        ]
      ],
      "tags": [
        "derogatory",
        "offensive"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see smooth, brain."
      ],
      "links": [
        [
          "smooth",
          "smooth#English"
        ],
        [
          "brain",
          "brain#English"
        ]
      ],
      "tags": [
        "derogatory",
        "offensive"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "smoothbrain"
    }
  ],
  "word": "smooth brain"
}