"fast one" meaning in English

{
  "forms": [
    {
      "form": "fast ones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fast one (plural fast ones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "73 27",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "85 15",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "90 10",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "If I bought a car I'd want a fast one.",
          "type": "example"
        }
      ],
      "glosses": [
        "Used other than figuratively or idiomatically: see fast, one."
      ],
      "id": "en-fast_one-en-noun-iRQicg9m",
      "links": [
        [
          "fast",
          "fast#English"
        ],
        [
          "one",
          "one#English"
        ]
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "The salesman tricked me into paying twice for the same thing. That was a fast one!",
          "type": "example"
        }
      ],
      "glosses": [
        "A trick or deception."
      ],
      "id": "en-fast_one-en-noun-sPqHtkH8",
      "links": [
        [
          "pull a fast one",
          "pull a fast one"
        ]
      ],
      "qualifier": "but not exclusively",
      "raw_glosses": [
        "(usually, but not exclusively, in the expression pull a fast one) A trick or deception."
      ],
      "raw_tags": [
        "in the expression pull a fast one"
      ],
      "tags": [
        "usually"
      ]
    }
  ],
  "word": "fast one"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "fast ones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fast one (plural fast ones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "If I bought a car I'd want a fast one.",
          "type": "example"
        }
      ],
      "glosses": [
        "Used other than figuratively or idiomatically: see fast, one."
      ],
      "links": [
        [
          "fast",
          "fast#English"
        ],
        [
          "one",
          "one#English"
        ]
      ]
    },
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "The salesman tricked me into paying twice for the same thing. That was a fast one!",
          "type": "example"
        }
      ],
      "glosses": [
        "A trick or deception."
      ],
      "links": [
        [
          "pull a fast one",
          "pull a fast one"
        ]
      ],
      "qualifier": "but not exclusively",
      "raw_glosses": [
        "(usually, but not exclusively, in the expression pull a fast one) A trick or deception."
      ],
      "raw_tags": [
        "in the expression pull a fast one"
      ],
      "tags": [
        "usually"
      ]
    }
  ],
  "word": "fast one"
}