be up on
be up on (something)
To have the most current knowledge about a particular subject or issue; to be up to date on (something). Make sure you're up on this account before our meeting tomorrow morning. I'm not too up on the policy changes happening this year—is there a reference guide I can consult?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be up onbe well informed about a matter or subject.
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