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Not know, etc. the first thing about something/somebody

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Figurative Use

This phrase is often used figuratively and doesn't require a literal first thing.

Illustration for Figurative Use
I don't know the first thing about ballet.
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Complete Ignorance

The phrase emphasizes a complete lack of knowledge, more than just basic unfamiliarity.

Illustration for Complete Ignorance
He doesn't know the first thing about social media.
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Expressing Humility

It can be used modestly to admit one's limitations in a particular subject.

Illustration for Expressing Humility
I'm a novice—don't know the first thing about chess.
Visual representation of the word "Not know, etc. the first thing about something/somebody"

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