The idiom "until you're blue in the face" means to keep doing or saying something repeatedly, even though it is unlikely to change the situation or convince someone to do something. It implies that the person has been trying for a long time and has become exhausted or frustrated.
For example, if you keep telling your friend to stop smoking, but they refuse to listen, you might say, "I can tell you to quit smoking until I'm blue in the face, but it won't make a difference if you're not willing to try."
This idiom is often used to express a sense of futility or exasperation when dealing with a stubborn or unresponsive person or situation. It suggests that the speaker has exhausted all possible options and is at a loss for what to do next.
• You can debate the issue with him until you're blue in the face, but he won't concede.
• I can explain the directions until you're blue in the face, but you still won't understand them.
• I could search for my keys until I'm blue in the face, but they're nowhere to be found.
• You can study the material until you're blue in the face, but you won't pass the exam without understanding it.
• He can argue with her until he's blue in the face, but she won't change her mind.
• You can repeat the same advice to him until you're blue in the face, but he won't listen.