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Idioms

know what's what

This page is about the idiom know what's what

Meaning

If you know what's what, you have a lot of experience and you understand things well.

For example

  • Lou has been in the music business for over thirty years so he really knows what's what.

  • Where can we find someone who knows what's what when it comes to doing business in China?

Quick Quiz

Alex knows what's what in the world of professional football. He's

a. just learned how to play

b. been a fan for several years

c. played and coached for fifty years

Idiom of the Day

Contributor: Matt Errey