v. phr. To be unable to decipher; be unable to identify; not know how to decide what something really is. I got a mysterious letter asking me to meet Santa Claus at 6 P.M. at the supermarket. Is this a joke? I don't know what to make of it.
NOT TO KNOW WHAT TO MAKE OF
Meaning of NOT TO KNOW WHAT TO MAKE OF in English
American idioms English vocabulary. Английский словарь американских идиом. 2012