The spelling of the phrase "more bumper" follows the standard English rules of phonetics. The word "more" is pronounced as /mɔːr/, with the long "o" sound represented by the phonetic symbol "/ɔː/". Meanwhile, the word "bumper" is pronounced as /ˈbʌmpər/, with the /ʌ/ symbol representing the short "u" sound. When combined, the phrase is pronounced as /mɔːrˈbʌmpər/. It means "even more exceeding" or "additional to an already impressive or great amount or size."