General Agreements To Borrow - GAB
You and your friends are a real bunch o' do-gooders. One of your friends is doing some fund-raising for a new house. Y'all decide to set up a special account where everyone can deposit funds to help each other out in times of need.
This way, you and your friends are able to help one another out in times of crisis without worrying about interest, or who borrowed what. The agreement you came to holds everyone to the same standards and repayment expectations.
Chances are high you'll be BFFs, with emphasis on the last F.