it's all Greek to me
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(it's) all Greek to me
I don't understand (something). The phrase comes from Shakespeare's play Julius Caesar. Can you make sense of these instructions? It's all Greek to me!
it's all Greek to meI can't understand it at all. informal
Greek meaning ‘unintelligible language or gibberish’ is recorded from the 16th century. In Shakespeare 's Julius Caesar, Casca, having noted that Cicero speaks Greek, adds ‘for mine own part, it was Greek to me’.