weak at/in the knees
phrase
: so nervous or powerfully affected that it is difficult to stand
The announcement made me weak at the knees.
She said hello to me and I went weak in the knees.
Cite this Entry
“Weak at/in the knees.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/weak%20at%2Fin%20the%20knees. Accessed 11 Mar. 2026.
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Merriam-Webster unabridged
