The correct spelling of the term "more gassedup" is "more gassed up," which means to be heavily under the influence of drugs or alcohol. In IPA phonetics, the pronunciation of this phrase would be /mɔr ɡæst ʌp/. The first syllable "mɔr" is pronounced like "more," while the second syllable "ɡæst" sounds like "gassed." The final syllable "ʌp" is pronounced as "up." To ensure clarity in communication, proper spelling and pronunciation of words are critical.