Sure! Let's break down the word "billfold."
A billfold is a small, flat case that you can keep in your pocket. It is designed to hold paper money (like bills) and sometimes cards (like credit cards or identification).
You can use the word "billfold" when you want to refer to this type of wallet. It is especially common in American English.
In more advanced contexts, you might hear people use "billfold" in discussions about personal finance or fashion, where the style of a billfold can reflect someone's personality or social status.
While "billfold" primarily refers to the wallet, in some contexts, it can also refer to the act of folding bills. However, this usage is less common.
There aren't specific idioms or phrasal verbs that include the word "billfold." However, you might hear phrases like "lighten your billfold," which means to spend money or reduce the amount of cash you have.
In summary, a billfold is a convenient and compact way to carry your money and cards.