Cách sử dụng
The expression "at the drop of a hat" means to do something immediately or without hesitation. It is often used when someone is willing to do something quickly or suddenly, without any prior planning or preparation. For example, if your friend asks you to go on a spontaneous road trip, you might say "Sure, I'll go at the drop of a hat!" This expression can be used in many situations where someone is ready and willing to do something without delay.