buckle down

buckle down idiom
Set to work, apply oneself with determination, as in All right, we'll buckle down now and study for exams. Originating about 1700 as buckle to, the expression gained currency with the football song “Buckle-Down, Winsocki” (from the Broadway musical comedy Best Foot Forward, 1941). [Mid-1800s]

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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