A billfold filler is a person who is responsible for filling a WALLET or billfold with money. The job requires the person to have four-letter words such as ONES, CASH, tens, and WADS. Additionally, they must also be able to use six-letter words such as WALLET and five-letter words such as SPENT, as well as seven-letter words such as tenspot. This job is important in ensuring that people have enough money to pay for their expenses.