weak at the knees

This page is about the idiom weak at the knees.

Meaning: If you go weak at the knees, you feel an emotion so strongly that it makes you feel unstable on your feet.

For example:

  • When he looked at me and smiled, I felt weak at the knees. He was the most beautiful man I'd ever seen!

  • Just thinking about getting up in front of a thousand people makes me weak at the knees. It's terrifying!

Quick Quiz:

Carlos gasped and went weak at the knees when he realised he had

a. put a little bit too much sugar in his tea

b. forgotten to tie one of his shoelaces

c. lost his passport, money and credit cards

Idiom of the Day

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Contributor: Matt Errey