Revolver
  
Cop shows, right? But no. It's not a Glock. Nor a Magnum. Nor anything Winchester (they do rifles, not handguns.)
A revolver is a line of credit that revolves around a variety of inputs, but usually, based on duration or due dates when the money is expected to be paid off.
Think: revolving line of credit. "Every 6 months, we'll reassess your creditworthiness, what we'll charge you to borrow money, and what other covenants we'll layer on top. Our attitude will revolve like our finger when you start whining about how much it costs to rent this money."