buckle down

phrasal verb

buckled down; buckling down; buckles down

Definition of buckle down

informal

: to start to work hard You had better buckle down if you want to get good grades.

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“Buckle down.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/buckle%20down. Accessed 18 May. 2021.

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