"back up the truck" meaning in English

{
  "etymology_text": "From the idea of bringing a truck to a location to be loaded with goods.",
  "forms": [
    {
      "form": "backs up the truck",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "backing up the truck",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "backed up the truck",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "backed up the truck",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "back up the truck"
      },
      "expansion": "back up the truck (third-person singular simple present backs up the truck, present participle backing up the truck, simple past and past participle backed up the truck)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Finance",
          "orig": "en:Finance",
          "parents": [
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2011, David M. Smith, Hany A. Shawky, Institutional Money Management, page 82",
          "text": "When spreads are very low and contracting, back up the truck and buy equities. When they are high and rising, it's time to hide.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To take advantage of favourable pricing by purchasing a large amount."
      ],
      "id": "en-back_up_the_truck-en-verb-Ta9f7YAJ",
      "links": [
        [
          "finance",
          "finance#Noun"
        ],
        [
          "advantage",
          "advantage"
        ],
        [
          "favourable",
          "favourable"
        ],
        [
          "pricing",
          "pricing"
        ],
        [
          "purchasing",
          "purchase"
        ],
        [
          "amount",
          "amount"
        ]
      ],
      "raw_glosses": [
        "(informal, idiomatic, chiefly finance, chiefly US) To take advantage of favourable pricing by purchasing a large amount."
      ],
      "tags": [
        "US",
        "idiomatic",
        "informal"
      ],
      "topics": [
        "business",
        "finance"
      ]
    }
  ],
  "word": "back up the truck"
}

{
  "etymology_text": "From the idea of bringing a truck to a location to be loaded with goods.",
  "forms": [
    {
      "form": "backs up the truck",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "backing up the truck",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "backed up the truck",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "backed up the truck",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "back up the truck"
      },
      "expansion": "back up the truck (third-person singular simple present backs up the truck, present participle backing up the truck, simple past and past participle backed up the truck)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English idioms",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs",
        "Quotation templates to be cleaned",
        "en:Finance"
      ],
      "examples": [
        {
          "ref": "2011, David M. Smith, Hany A. Shawky, Institutional Money Management, page 82",
          "text": "When spreads are very low and contracting, back up the truck and buy equities. When they are high and rising, it's time to hide.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To take advantage of favourable pricing by purchasing a large amount."
      ],
      "links": [
        [
          "finance",
          "finance#Noun"
        ],
        [
          "advantage",
          "advantage"
        ],
        [
          "favourable",
          "favourable"
        ],
        [
          "pricing",
          "pricing"
        ],
        [
          "purchasing",
          "purchase"
        ],
        [
          "amount",
          "amount"
        ]
      ],
      "raw_glosses": [
        "(informal, idiomatic, chiefly finance, chiefly US) To take advantage of favourable pricing by purchasing a large amount."
      ],
      "tags": [
        "US",
        "idiomatic",
        "informal"
      ],
      "topics": [
        "business",
        "finance"
      ]
    }
  ],
  "word": "back up the truck"
}