Greek to someone

(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

n. something incomprehensible to someone; something as mysterious as Greek writing. I don’t understand this. It’s all Greek to me. See also: Greek, someone