Breaking the bank is a casino term that derives from everyday life situations. Symbolically, it is connected to breaking a piggy bank and having coins pour out of it.
When it comes to casino terms, in particular, breaking the bank refers to winning big at any casino game, and it is most often related to someone landing a jackpot on a slot machine and having coins fall out from it.
Some players also use the term to refer to someone breaking the casino’s bank and taking a big chunk of their money by winning a large sum.
However, regardless of the situation and the specifics, the next time you find yourself in a casino and end up with a massive win, you can safely proclaim that you have broken the bank.