know what's what
знать что к чему, быть осведомлённым
I am sure Jim knows what's what about a lot of things.
Другие идиомы:
- not know the first thing about something
- know (someone or something) like the back of one's hand
- know the ropes
- know (something) from memory
- know one's place
- know where (someone) stands on (something)
- know one's own mind
- know a thing or two (about someone or something)
- know a trick or two
- not know if one is coming or going
- know-how
- know (something) backwards and forwards
- know (something) only too well
- know where all the bodies are buried
- know-it-all