have (something) down to a science

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have (something) down to a science

To learn, master, or understand something perfectly, to the point of requiring little or no focus to do, recall, or accomplish it. Primarily heard in UK, Australia. I had my routine down to a science so there wouldn't be any room for error during the performance. I'm a working mom of three, so I've got lunch-making down to a science—I put out all the pieces of bread, add jelly to each one, and then do the same with peanut butter.
See also: down, have, science