Cách sử dụng
The phrase "till the cows come home" means for a very long time. We use it when we want to say that we will do something or something will happen for a very long time, even if it takes all day and night. For example, "I could dance till the cows come home" means that I could dance for a very long time without getting tired. We don't actually mean that cows will come home, it's just a way of expressing that something will take a very long time.