your guess is as good as mine

idiom

Meaning

An expression used to admit that one has no more knowledge or insight about a situation than the person asking.

Examples

  • I have no idea why the server crashed; your guess is as good as mine.
  • When asked if the project would be finished by Friday, the manager shrugged and said, 'Your guess is as good as mine.'

Synonyms: I don't know, I have no clue, who knows, it's anyone's guess