talk until one is blue in the face

talk until (one) is blue in the face

To speak (about something) repeatedly and at length, used especially when one is not being heeded or listened to. You can talk until you are blue in the face, but nothing you say will convince Terry to change his mind. I talked until I was blue in the face, but everything I said just seemed to be going over everyone's heads.
See also: blue, face, talk, until
Farlex Dictionary of Idioms.

talk until one is blue in the face

Fig. to talk until one is exhausted. I talked until I was blue in the face, but I couldn't change her mind. She had to talk until she was blue in the face in order to convince him.
See also: blue, face, one, talk, until
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

talk until one is blue in the face

in. to talk until one is exhausted. She talked until she was blue in the face but could not change their minds.
See also: blue, face, one, talk, until
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • talk until (one) is blue in the face
  • talk till (one) is blue in the face
  • talk until (one's) face is blue
  • talk till (one's) face is blue
  • lie with
  • lie with (one)
  • his, her, etc. ears are flapping
  • at great length
  • explain
  • rabbit on