Refer to: A Touch of Glass(Hustle Season 1 Episode 5)Mrs. Winterborn was a stickler for discipline, strict, aloof, cruel when she felt like it, sacked staff at the drop a hat.at the drop of a hat = quickly and easily, without need to decide
If you would do something quickly and easily, without thinking about it, you would do it at the drop of a hat.
Example: "Would you travel around the world if you had the money?" Reply: "At the drop of a hat."When a hat drops off your head, it falls quickly and suddenly, and that is how fast you would do it at the drop of a hat.
Example: "I would take a job like that at the drop of a hat."You know you would do it, because you have already decided, when you would do it at the drop of a hat.
Example: "If you get an extra ticket, let me know. I would go at the drop of a hat."
