The spelling of "most hotdog" is straightforward once the pronunciation is understood. In IPA phonetic transcription, it is pronounced as /moʊst ˈhɑtdɔɡ/. "Most" is pronounced with a long "o" sound and the "t" is a hard stop. "Hotdog" is pronounced with an "h" sound at the beginning followed by the "o" sound as in "boat" and a soft "g" at the end. Overall, the spelling is representative of the sounds used in the pronunciation.