{v. phr.} To be of little or no value. (Said of plans, ideas, etc.) * /"That's a fairly interesting concept you got there, Mike, but the competition is bound to say that it doesn't add up to a can of beans."/
DOESN'T ADD UP TO A CAN OF BEANS
Meaning of DOESN'T ADD UP TO A CAN OF BEANS in English
Slang English vocab. Английский сленговый словарь. 2012