The phrase "haddest egg one face" looks quite unusual, but it can be spelled according to IPA phonetic transcription as /ˈhædɛst ɛg wʌn feɪs/. The pronunciation is "had-est egg one face", with a stress on the first syllable of "haddest". The word "haddest" is the archaic second-person singular past tense of "have", and "one" and "face" are pronounced as expected. This phrase doesn't have any common meaning, but it could be used creatively in poetry or literature.