someone's knees are knocking
idiom
informal
—used to say that a person's knees are shaking from nervousness or fear
Her knees were knocking in terror.
Dictionary Entries Near someone's knees are knocking
someone's knees are knocking
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“Someone's knees are knocking.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/someone%27s%20knees%20are%20knocking. Accessed 16 Apr. 2024.
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Merriam-Webster unabridged
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