"without blinking an eye" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "without blinking an eye (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "without batting an eye"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2015, Allison Hobbs, Karen E. Quinones Miller, Hittin' It Out the Park, page 200",
          "text": "The manager of the store promised to deliver the selected furniture in two hours. After plunking down $11,000 without blinking an eye, Randy escorted Sexy out of the high-end store.",
          "type": "quotation"
        },
        {
          "ref": "2015, Scott Ludwig, 50 Ways to Leave Your 50'S",
          "text": "The line in Las Vegas was Denver by three points: Hell, I would have given Seattle two touchdowns without blinking an eye.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of without batting an eye"
      ],
      "id": "en-without_blinking_an_eye-en-adv-foEAvYKV",
      "links": [
        [
          "without batting an eye",
          "without batting an eye#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "not-comparable"
      ]
    }
  ],
  "word": "without blinking an eye"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "without blinking an eye (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "without batting an eye"
        }
      ],
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English uncomparable adverbs"
      ],
      "examples": [
        {
          "ref": "2015, Allison Hobbs, Karen E. Quinones Miller, Hittin' It Out the Park, page 200",
          "text": "The manager of the store promised to deliver the selected furniture in two hours. After plunking down $11,000 without blinking an eye, Randy escorted Sexy out of the high-end store.",
          "type": "quotation"
        },
        {
          "ref": "2015, Scott Ludwig, 50 Ways to Leave Your 50'S",
          "text": "The line in Las Vegas was Denver by three points: Hell, I would have given Seattle two touchdowns without blinking an eye.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of without batting an eye"
      ],
      "links": [
        [
          "without batting an eye",
          "without batting an eye#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "not-comparable"
      ]
    }
  ],
  "word": "without blinking an eye"
}