know what's what

US /noʊ wʌts wʌt/
UK /noʊ wʌts wʌt/
"know what's what" picture
1.

sapere come stanno le cose, essere al corrente

to have a good understanding of a situation or of how things work

:
She's been in this business for years, so she really knows what's what.
È in questo settore da anni, quindi sa davvero come stanno le cose.
You need to spend some time learning the ropes if you want to know what's what around here.
Devi dedicare del tempo a imparare le basi se vuoi sapere come stanno le cose qui.