The correct spelling of the phrase "doest an about face" is actually "does an about-face." The word "does" is spelled with the silent letter "s," and the compound noun "about-face" is hyphenated. The IPA phonetic transcription for "does" is /dʌz/ and for "about-face" is /əˌbaʊt ˈfeɪs/. This phrase means to turn around completely, especially in a military formation, and is often used metaphorically to describe a sudden change in direction or opinion.