(it's all) Greek to (one)
cliché (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." Chris said that Foucault's theories are all Greek to him? Oh great, who's going to explain them all to us then?
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
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.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.