Buckle down

verb

Definitions

Verb
  1. 1
    To apply oneself to study, or a task or work; to focus on or take a serious attitude towards something; to put forth the needed effort. idiomatic, intransitive

    "If he would buckle down and do his homework, he could be an excellent student."

  2. 2
    work very hard, like a slave wordnet

Etymology

From buckle + down.

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