The word "Booser" is spelled with a "oo" sound in the middle, which is represented by the IPA phonetic transcription "/uː/". This long "u" sound is created by rounding the lips and making a sound that is similar to "oo". The spelling of "Booser" may cause confusion, as it could be easily mistaken for "Boozer". However, with the correct IPA transcription, it is clear that "Booser" should be pronounced with a long "u" sound in the middle.