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:
- know a thing or two (about someone or something)
- know better (than to do something)
- know where (someone) stands on (something)
- know one's stuff
- know when one is not wanted
- know (someone) by sight
- know (something) in one's bones
- know all the tricks of the trade
- know (something) backwards and forwards
- know-it-all
- know one's place
- know the score
- not know the first thing about something
- know (something) only too well
- not know if one is coming or going