The spelling of the word "BIGGT" appears to be erroneous and not recognized in any major English dictionary. However, if we were to use the International Phonetic Alphabet (IPA) to transcribe this word, it could be spelled /bɪɡt/ with the "i" pronounced as in "bit", the "g" as in "go", and the "t" as in "top". Despite its unclear origins, it's important to note that accurate spelling is crucial for effective communication in written language.