The term 'Squished Square' is a reference to the shape of a rhomb, which is a five-letter word. A rhomb is a two-dimensional geometric shape with four sides of equal length and opposite angles of equal measure. It is also known as a diamond shape, and it is often used in quilting and other craft projects. The term 'Squished Square' is used to describe a rhomb that has been compressed or squished, resulting in a shape that is no longer a perfect square.