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 which is which
- know where (someone) stands on (something)
- know a trick or two
- know which side one's bread is buttered on
- know (something) in one's bones
- know when one is not wanted
- know one's place
- know the ropes
- know (someone or something) like the back of one's hand
- know-how
- know one's stuff
- know the score
- know (someone) by sight