The word "butthorn" is typically spelled with two t's, as in /ˈbʌθ.hɔrn/. The first syllable is spelled with a "u" and a "th" digraph, like in the word "butter". The second syllable has an "or" sound represented by the letter "o" and the letter "r". The word is a slang term often used as an insult to refer to someone who is annoying or bothersome. It is not a commonly used or accepted word in mainstream language.