Not know the first thing about somebody/something

usgb
phrase

To have no knowledge or understanding about a particular subject or person.

I don't know the first thing about coding, so I can't help with your computer problem.
Visual representation of "not know the first thing about somebody/something" - To have no knowledge or understanding about a particular subject or person.

Often appears as...

  • don't know the first thing about
  • she doesn't know the first thing about

Usage tips

Idiomatic

Definition 1 of 1
Visual representation of "not know the first thing about somebody/something"
LampPro Tip 1/3

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.
LampPro Tip 2/3

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.
LampPro Tip 3/3

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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