buckle up

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Idioms and Phrases

Fasten a seat belt, as in All the children must learn to buckle up as soon as they get in a car . This term came into wide use in the second half of the 1900s, when seat belts became mandatory automobile equipment. Earlier they had been used mainly in airplanes.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

buckle under Buckley

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