compare notes on
compare notes on (someone or something)
To discuss one's feelings on or experience of someone or something with another person. This afternoon, we'll have to compare notes on the applicants we've interviewed so far.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
compare notes on someone or something
to share observations on someone or something. We took a little time to compare notes on our ancestors and have discovered that we are cousins.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.