Why do we call the food between two slices of bread a "sandwich"? The answer takes us to an 18th-century English gentleman's club where card games lasted all night and proper meals took too long. While people had been putting food between bread for thousands of years, one man's practical solution during a particularly engrossing evening changed how we name this portable meal forever. From formal dining rooms to school lunch boxes, this is the surprising story behind every sandwich you've ever eaten.