The spelling of the word "most biggun" may seem unusual to some, but it is a phonetic representation of the phrase "most big one". The IPA transcription for this phrase is /moʊst bɪɡ wʌn/. In some dialects or informal speech, the "one" may be pronounced as "gun" with a dropped "n" sound, leading to the spelling "biggun". This spelling may be seen in literature or media depicting characters with regional accents or dialects.