The spelling of the word "shaggest" is incorrect in standard English. The correct spelling should be "shaggiest." The IPA phonetic transcription for "shaggiest" is /ˈʃæɡ.i.ɪst/, with the stressed syllable being "shag" and the "iest" suffix indicating the superlative degree. This word is often used to describe something or someone that is extremely shaggy or covered in thick hair or fur. It is important to use correct spelling and pronunciation when communicating in any language.