break the bank Definition

bank¹
noun

1. A financial organization which keeps money in accounts for its clients, lends money, exchanges currency, etc.
2. A box in which money can be saved, especially by children. See also piggy bank.
3. A place where something is stored or collected for later use. Also in compounds.

Example: blood bank
Example: databank
Thesaurus: accumulation, cache, depository, hoard, reserve, savings, stock, store, treasury.
4. In some games: a stock of money controlled by one of the players (the banker).

verb banked, banking

1. To put (money) into a bank.
intr
2. To have a bank account.

Example: They bank with Lloyds

Idiom: break the bank

In gambling: to win from eg a casino the sum of money fixed as the limit it is willing to lose in any one day.

Etymology: 15c, meaning ‘a moneylender's shop': from French banque.

Phrasal Verb: bank on something

To rely on it or expect it.