have the first idea
The phrase "have the first idea" is often used in negative constructions to express a lack of basic knowledge or understanding about something.
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Definition
B2General
(informal, negative)To possess any basic knowledge or understanding about a subject.
Example
- He didn't have the first idea about how to fix the car.
- She doesn't have the first idea what you're talking about.
Similar
Terms that have similar or relatively close meanings to "have the first idea":