have (something) down cold
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down cold
Learned, mastered, or understood perfectly, to the point of requiring little or no focus to do, recall, or accomplish. Make sure you practice these equations until you have them down cold. I always get my routine down cold so there won't be any room for error during the performance.
have (something) down cold
To learn, master, or understand something perfectly, to the point of requiring little or no focus to do, recall, or accomplish it. Make sure you practice these equations until you have them down cold. I always get my routine down cold so there won't be any room for error during the performance.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
down cold, have
Learn or accomplish perfectly. For example, I have this song down cold. The slangy use of cold for "completely" dates from the late 1800s and the phrase itself from about 1900.
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.