1. To drop or fall from a particular place or height. Lucy fell down at the playground and scraped her knee.One of the picture frames fell down last night—that was the noise you heard.A: "What was that?" B: "Sounds like something fell down in the closet."
2. To fail to do something adequately or as expected. Often used in the phrase "fall down on the job." He's a really bright young man, but time management is one area where he really tends to fall down.Jeez, what a glaring mistake. It looks like someone fell down on the job.It was the government's duty to make sure their citizens were protected from a financial disaster like this, but they've fallen down on the job.
Fail to meet expectations; lag in performance. For example, It was disappointing to see him fall down on the job. This expression transfers a literal drop to a figurative one. [Second half of 1800s]
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