Know somebody/something inside out

usgb
phrase

To understand or be familiar with someone or something in a very detailed way.

He's been working on this project for a year now, he knows it inside out.
Visual representation of "know somebody/something inside out" - To understand or be familiar with someone or something in a very detailed way

Often appears as...

  • know the subject inside out
  • know the city inside out

Usage tips

Idiomatic

Definition 1 of 2
Visual representation of "know somebody/something inside out"
LampPro Tip 1/3

Detail Significance

Emphasizes extensive knowledge about intricate details of a subject or a system.

Illustration for Detail Significance
The mechanic knows that car inside out; no one else should touch it.
LampPro Tip 2/3

Expert Implication

Implies a level of expertise or professionalism in a particular area.

Illustration for Expert Implication
She knows the software inside out and can solve any issue that arises.
LampPro Tip 3/3

Not Literal

It's a figurative term; you don't actually see the inside of a topic.

Illustration for Not Literal
Despite the name, health inspectors don't actually know every restaurant inside out.
Visual representation of the word "Know somebody/something inside out"

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