Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “know what's what”

know what's what

informal
If you know what's what, you have a lot of experience and can judge people and situations well: Linda's been in the business for 30 years - she knows what's what.Knowing and learning
(Definition of know what's what from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Translations of “know what's what”

Word of the Day

pump iron

to lift heavy weights for exercise

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More