keep (something) straight (in one's mind/head)(redirected from keep it straight in his mind)
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keep (something) straight (in one's mind/head)
To be able to understand something clearly and comprehensively; to keep the details of something clear in one's mind. This project is getting so out of control. I can barely keep it straight in my mind anymore! I'm no good at lying because I can never keep my story straight!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
keep things straight (in one's mind)
Fig. to correctly distinguish one thing from other things. These two bottles look so much alike. It's hard to keep them straight.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.