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-how
- know (someone) by sight
- know when one is not wanted
- know one's own mind
- know one's place
- know (something) by heart
- know one's stuff
- know (something) only too well
- know the ropes
- know which side one's bread is buttered on
- know which is which
- know (something) backwards and forwards
- know better (than to do something)
- know all the tricks of the trade
- know (something) inside out