The story
In reference to the 1968 case of Barclays Bank Ltd v Quistclose Investments Ltd.
Etymology from Wiktionary, CC BY-SA 4.0.
Quistclose trust
Today it means: A trust created where a creditor has lent money to a debtor for a particular purpose. If the debtor uses the money for other purposes, it is held on trust for the creditor. Any inappropriately spent money can then be traced and returned to the creditor. Full definition →