The spelling of "most fifty fifty" may appear confusing at first glance, but it actually follows the rules of English phonetics. The word "most" is pronounced as /məʊst/ with a long "o" sound, while "fifty" is pronounced as /ˈfɪfti/ with a short "i" sound. When combining the two words, the "o" sound blends into the "i" sound, resulting in the unique pronunciation of /ˈməʊst ˌfɪfti ˈfɪfti/. This phrase simply means an even chance of success or failure.