billfold

From bill +‎ fold.

billfold (plural billfolds)

1. (US) A small, folding sleeve or case designed to hold paper currency, as well as credit cards, pictures, etc.

   Lenny had so many pictures of his family stuffed into his billfold that it barely fit into his pocket.

• (folding case for holding currency) pocketbook, wallet

• champagne taste on a beer billfold