Talk until (one) is blue in the face informal slang
The word 'until' can be changed to 'till'.
Used to express efforts to expain or talk about something again and again but one doesn't listen to or change their opinion
You talked until you is blue in the face, but they didn't believe you.
The mother always talks with her son about his messy room until she is blue in the face because he never cleans up his room.
I talked until I was blue in the face, but I couldn't change Mary's opinion. You know, she has continued to believe her ex.
Used to imply that one talks for such a long time that someone becomes tired or bored
Said of someone who talks constantly.
Talk so much that the listener becomes exhausted or bored
The verb "talk" and "be" should be conjugated according to its tense.
The parents tried convincing Mike to study abroad and talked until they were blue in the face.
The phrase "talk until (one) is blue in the face" derived from the 1820s.