Cách sử dụng
The expression "not turn a hair" means to remain calm and unbothered in a difficult or surprising situation. It can be used in various situations like when someone is being accused of something they didn't do, or when someone hears shocking news but seems unaffected by it. For example, if your friend told you that they lost all their money in a bet, but they didn't seem upset about it, you could say, "Wow, you didn't turn a hair when you told me that." Essentially, it means that the person remained emotionally steady, without showing any visible signs of shock or upset.