"think fast" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "think fast",
      "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": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English sentences",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Catch! (when throwing an object unexpectedly)"
      ],
      "id": "en-think_fast-en-intj-fWt3yQj~",
      "links": [
        [
          "Catch",
          "catch"
        ]
      ]
    }
  ],
  "word": "think fast"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "think fast",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English sentences",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "Catch! (when throwing an object unexpectedly)"
      ],
      "links": [
        [
          "Catch",
          "catch"
        ]
      ]
    }
  ],
  "word": "think fast"
}