Greek to

(it's all) Greek to (one)

(It is) completely unintelligible, as if it is written in a language that one does not speak. The phrase comes from Shakespeare's play Julius Caesar. Mom said these instructions are Greek to her and that we should show them to Dad. A: "Can you understand this error message?" B: "Sorry, Greek to me. You'd better ask one of the programmers."
See also: Greek

Greek to (someone)

incomprehensible to someone; as mysterious as Greek writing. I don't understand this. It's all Greek to me. She said it was Greek to her, and that it made no sense at all.
See also: Greek
References in periodicals archive ?
Patterson sees and must see a permanent and perpetual obsessive attention and consequent tension; I think that the most apparent and consistent attitude of the free Greek to the slave was to ignore him him, not to be conscious of him.