1. To be borrowing or taking money from one source to fund or repay the debt of another. The phrase refers to the Christian leaders Peter and Paul, who were both prominent figures in the early church. Never use a credit card to pay a debt—that's just robbing Peter to pay Paul!

2. To be shifting resources from one part of an organization or entity to another, often needlessly or inefficiently. When we make each department pay rent for their facilities, it seems a bit like we're robbing Peter to pay Paul—it's all the same organization, after all.