know what's what
знать что к чему, быть осведомлённым
Пример использования идиомы know what's what:
I am sure Jim knows what's what about a lot of things.
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Другие идиомы:
- know which side one's bread is buttered on
- know one's stuff
- know where all the bodies are buried
- know the score
- know (something) by heart
- know where (someone) stands on (something)
- know (something) only too well
- know (someone or something) like the back of one's hand
- know all the tricks of the trade
- know the ropes
- not know the first thing about something
- know-it-all
- know (something) in one's bones
- know a trick or two
- know when one is not wanted