Cách sử dụng
The expression "cost/pay an arm and a leg" means that something is very expensive, and it usually suggests that the price is very high and not worth paying. You can use this phrase in situations where you are talking about something that is expensive, such as a car or a house, and you want to emphasize that it is too expensive. For example, you could say "I would love to buy that new phone, but it costs an arm and a leg, so I think I'll stick with my old one for now."