có trăng quên đèn
Proposed by a contributor, not yet supported by evidence.
Meaning · English
To forget something due to being infatuated with something better
Literally: having moon, forget lamp
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Anh ấy có trăng quên đèn khi gặp cô gái xinh đẹpHe forgot about his current girlfriend when he met the beautiful girl
AI-drafted example auto-approved by rule (illustrative, not a corpus attestation)
Sources & notes
Listed on Vietnamese Wikiquote “Thành ngữ Việt Nam” (CC BY-SA 4.0, retrieved 2026-07-31); definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-07-30; pending editor spot-check.
Common questions
What does “có trăng quên đèn” mean?
To forget something due to being infatuated with something better Literally: having moon, forget lamp
Is “có trăng quên đèn” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.