get something down to a fine art
To become very skilled at something through practice
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Main Entry: ↑art
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to be or become very good at doing something, especially something difficult
Thesaurus: to be good at doing somethingsynonym
Main entry: fine art
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get sth down to a fine ˈart idiom
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I spend so much time travelling that I've got packing down to a fine art.
Useful english dictionary. 2012.