lose one's cool
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Become angry or upset and lose control of one's emotions
Nghĩa · Tiếng Việt
trở nên giận dữ hoặc bối rối và mất kiểm soát cảm xúc
Machine-translated — suggest a fix
Literally: lose temperature
Where it’s used:
Used
Widespread English
Examples
He lost his cool during the argument
AI-drafted example auto-approved by rule (illustrative, not a corpus attestation)
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 “lose one's cool” mean?
Become angry or upset and lose control of one's emotions Literally: lose temperature
Is “lose one's cool” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.