The phrase "doest about-face" is an old-fashioned way of describing a sudden reversal or change of direction. Synonyms for this phrase can include "switch gears", "make a U-turn", "reverse course", or "change tack". Each of these phrases captures the idea of making a sudden and complete change in direction or approach. Whether you're changing your mind about a decision, altering your plans for a project, or even just changing the subject in a conversation, these synonyms can help you express your thoughts clearly and effectively. So the next time you find yourself needing to do an about-face, remember that there are plenty of ways to say it with style!