be out of the question

be out of the question

To be impossible and/or impermissible. This phrase is often used to halt further consideration or discussion of a request. In this family, dating is out of the question until you're 18, and that's that. I'm sorry, but getting a huge project like this done in three days is just out of the question.
See also: of, out, question
Farlex Dictionary of Idioms.
See also:
  • how about
  • how/what about...?
  • (one's) best foot forward
  • best foot forward
  • eggs is eggs
  • How long is a piece of string?
  • from my cold, dead hands
  • kicking and screaming
  • beck and call
  • sure as eggs is eggs