"two brain cells to rub together" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "p",
        "head": "two brain cells to rub together"
      },
      "expansion": "two brain cells to rub together pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Anyone with two brain cells to rub together can come up with an idea for a better system. The problem is actually implementing it.",
          "type": "example"
        }
      ],
      "glosses": [
        "A modicum of intelligence."
      ],
      "id": "en-two_brain_cells_to_rub_together-en-noun-HY9VIggZ",
      "links": [
        [
          "modicum",
          "modicum"
        ]
      ],
      "raw_glosses": [
        "(informal) A modicum of intelligence."
      ],
      "tags": [
        "informal",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "two brain cells to rub together"
}

{
  "head_templates": [
    {
      "args": {
        "1": "p",
        "head": "two brain cells to rub together"
      },
      "expansion": "two brain cells to rub together pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English pluralia tantum",
        "English terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Anyone with two brain cells to rub together can come up with an idea for a better system. The problem is actually implementing it.",
          "type": "example"
        }
      ],
      "glosses": [
        "A modicum of intelligence."
      ],
      "links": [
        [
          "modicum",
          "modicum"
        ]
      ],
      "raw_glosses": [
        "(informal) A modicum of intelligence."
      ],
      "tags": [
        "informal",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "two brain cells to rub together"
}