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Not know the first thing about somebody/something

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Total Ignorance

This phrase emphasizes a complete lack of knowledge, as if not even the basics are understood.

Illustration for Total Ignorance
He doesn't know the first thing about cooking; he can't even boil water.
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Not Literal

The 'first thing' is not about sequence but highlights the depth of unfamiliarity.

Illustration for Not Literal
She said she didn't know the first thing about politics, not even who the president is.
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Figurative Speech

It's an idiomatic expression, meaning its meaning isn't derived from the individual words.

Illustration for Figurative Speech
'Not knowing the first thing' about cars means you're clueless, not missing a specific fact.
Visual representation of the word "Not know the first thing about somebody/something"

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