to know what is what
- idiom
- Informal
- After years of experience, she finally knows what is what in the industry.
Honestly, I don't even know what is what, but it smells, Herbie.
- Honestly, I don't even know what is what, but it smells, Herbie.
- It just means that you know what is what is enough.
- So then what what you know what was what would you say was your first crime?
- So in fact, I wanted to know what was what were the underpinnings of those theories?
Examples
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Honestly, I don't even know what is what, but it smells, Herbie.
-
I know what is what.
Fiction book (1998) -
I saw people struggling to get by, not knowing what was what and what was next.
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And you don't know what is what.
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Now I don't even know what is what, and that's exactly where I want to be.
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Most sensible people in town knew what was what, though, particularly when the newspaper reported that a body, beaten and bloated past recognition, had washed ashore at Belle Isle Lake.
Fiction book (1990) -
He has seen enough to know what is what when it comes to making decisions.
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With all the signs around, it's easy to know what is what in this situation.
Synonyms
To know the meaning of something
To be aware of what is happening
To find out what really happened
To understand a situation or subject well
Understand what really happens in a situation, often when it is bad
To understand how things work in a place or job
Antonyms
How Aware
Surface Forms
Morphology
The phrase is transparently built from 'know' plus the clause 'what is what' (i.e. which things are which / what is going on), so a learner who understands the constituent words can infer 'understand the true situation.' The pattern is compositional and parallels constructions in other languages, making it readily comprehensible to a B1 learner.
Etymology
The phrase know what is what comes from the simple picture of someone pointing and saying what is what — which thing is which. So, to know what is what means 'to understand the true situation' and to see the important facts.