A "frankenbank" refers to a financial institution that has been created through the merger or acquisition of multiple banks or financial entities, often resulting in a complex and unwieldy organization. This term highlights the challenges that arise from combining different systems, cultures, and practices, which can lead to inefficiencies and operational difficulties. The term suggests that the resulting institution, like Frankenstein's monster, may be powerful but is also potentially unstable or problematic due to its patchwork nature.