"be cool" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "be",
        "3": "cool"
      },
      "expansion": "be + cool",
      "name": "compound"
    }
  ],
  "etymology_text": "From be + cool.",
  "head_templates": [
    {
      "args": {},
      "expansion": "be cool",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2016, Erin Udell, “Could CSU's Chase McNary be the next Bachelor?”, in The Coloradoan:",
          "text": "That's why I scoured our newsroom for red yarn, watched an episode of \"The Bachelorette\" during work (shhh, be cool) and tacked pictures of reality TV stars alongside a scrap of notebook paper...",
          "type": "quote"
        }
      ],
      "glosses": [
        "Used to implore someone to not reveal illegal or improper activity."
      ],
      "id": "en-be_cool-en-intj-EwF5qqfR",
      "raw_glosses": [
        "(imperative) Used to implore someone to not reveal illegal or improper activity."
      ],
      "tags": [
        "imperative"
      ]
    }
  ],
  "word": "be cool"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "be",
        "3": "cool"
      },
      "expansion": "be + cool",
      "name": "compound"
    }
  ],
  "etymology_text": "From be + cool.",
  "head_templates": [
    {
      "args": {},
      "expansion": "be cool",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "Pages with 1 entry",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2016, Erin Udell, “Could CSU's Chase McNary be the next Bachelor?”, in The Coloradoan:",
          "text": "That's why I scoured our newsroom for red yarn, watched an episode of \"The Bachelorette\" during work (shhh, be cool) and tacked pictures of reality TV stars alongside a scrap of notebook paper...",
          "type": "quote"
        }
      ],
      "glosses": [
        "Used to implore someone to not reveal illegal or improper activity."
      ],
      "raw_glosses": [
        "(imperative) Used to implore someone to not reveal illegal or improper activity."
      ],
      "tags": [
        "imperative"
      ]
    }
  ],
  "word": "be cool"
}