The spelling of the word "Arse foot" might seem perplexing at first glance, but it is a phonetically accurate representation of the way the word is pronounced in certain dialects. The word "arse" is often pronounced with a long "a" sound, represented in IPA as /ɑːs/, while "foot" is pronounced with a short "oo" sound, represented as /fʊt/. When the two words are combined, the resulting pronunciation is roughly approximated by the spelling "arse foot".