# know what is what

idiom

Source: https://englishreference.com/idiom/know-what-is-what
Updated: 2026-08-10

## Meaning

To understand the current situation; to know what is going on.

## Examples

- Ask the manager because she knows what is what.
- After working here for ten years, he really knows what is what in this industry.
- The seasoned diplomat navigated the complex negotiations with ease, as she clearly knew what is what regarding the regional political tensions.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.