Until you are blue in the face意思

"Until you are blue in the face" is an English idiom that means to continue doing something or saying something to the point of exhaustion or until it is no longer effective. The phrase suggests that the action or statement is being repeated so often that it becomes tedious or pointless. The literal meaning of being "blue in the face" refers to the color of someone's face due to lack of oxygen, which can happen when people speak or shout for a long time without taking a breath.

Here's an example of how this idiom might be used in a sentence:

"I've told you over and over again to clean your room, but you just won't listen. I could talk until I'm blue in the face, and you still wouldn't do it."

In this example, the speaker is expressing frustration with the other person's refusal to listen and act on their advice, despite repeated attempts to convince them.