not have a clue
The phrase "not have a clue" is an informal idiom indicating complete ignorance or lack of understanding about something.
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Definition
B2General
(informal, idiom)To be completely unaware or ignorant about a topic or situation.
Example
- Many children do not have a clue how technology works.
- Who invented algebra? I don't have a clue.
B2Problem-Solving
(informal, idiom)To be unable to comprehend or solve a problem.
Example
- Do you know how to fix this car? I have no clue.
- He did not have a clue where he was going.
Similar
Terms that have similar or relatively close meanings to "not have a clue":
have no ideahave the first ideabe not to knowknow beans aboutclue uphave no business