Borkin's Folly is a term used to describe a failed project or venture, often associated with the construction of a large, ambitious structure that ultimately did not succeed. The name originates from a specific case involving a developer named Borkin, who invested heavily in a grand building that was never completed due to financial issues and poor planning. The term has since evolved to represent any undertaking that is marked by overreach and results in significant loss or disappointment. It serves as a cautionary tale about the risks of ambitious projects without proper feasibility studies and realistic assessments of potential challenges.