{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
Dictionary of English idioms . Словарь английских идиом. 2012