Cách sử dụng
The expression "cudgel your brains" means to think very hard or to use all of your mental efforts to figure something out. It is a way to encourage someone to use their brain power to solve a difficult problem or puzzle. You might use this expression when working on a challenging project or task, or when trying to come up with a solution to a problem. It is particularly useful when you need to be creative or think outside the box in order to find a solution. So if someone tells you to "cudgel your brains," it means they want you to use all of your mental energy and focus to come up with the best possible solution.