The term 'Metaphorical Casino Loss' can be broken down into two crossword solutions: SHIRT (5 letters). A metaphor is a figure of speech that compares two unrelated things to help explain a concept. In this case, the metaphor is comparing a casino loss to a SHIRT. This comparison implies that the loss is something tangible and physical, like a SHIRT, but it is actually an intangible concept, such as money or time. The use of this metaphor helps to emphasize the magnitude of the loss.