of choice

of choice idiom
Preferred above others, as in A strike is the union's weapon of choice. Used with other prepositions (by, for, with), all meaning “by preference,” this idiom dates from about 1300.

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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