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.
- 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?
Alex knows what's what in the world of professional football. He's
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Contributor: Matt Errey