The correct spelling of the word "art seasick" is actually "arseasick". The use of "arse" instead of "art" is a British slang term meaning "buttocks". The word is pronounced as /ɑːsˈsiːsɪk/ in IPA phonetic transcription, with the stress on the first syllable. The first vowel sound is the "a" sound as in "car", followed by a prolonged "s" sound. The final two syllables are pronounced as "sick" with a short "i" sound as in "sit".