it's all Greek to me
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Something is completely unintelligible or incomprehensible
Nghĩa · Tiếng Việt
một điều gì đó hoàn toàn không thể hiểu hoặc không rõ ràng
Machine-translated — suggest a fix
Literally: Greek language
Where it’s used:
Used
Widespread English
Examples
Well, it's all Greek to me, but so long as it keeps him happy.’
British National Corpus sentence via the MAGPIE corpus (CC BY 4.0, retrieved 2026-07-30)
Sources & notes
Listed in Wiktionary’s “English idioms” category (retrieved 2026-07-29); definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-07-31; pending editor spot-check.
Common questions
What does “it's all Greek to me” mean?
Something is completely unintelligible or incomprehensible Literally: Greek language
Is “it's all Greek to me” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.