do one's homework

do one's homework

Be well prepared, as in Steve had done his homework before the meeting and could answer all of the client's questions . This usage transfers a school assignment to a broader context. [c. 1930]
See also: homework
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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