weak in the knees

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weak in the knees

Unsteady or flustered due to a strong emotional reaction to someone or something. Hearing the news of my father's sudden death, I went weak in the knees and could barely remain standing. Just thinking about Samantha makes me feel weak in the knees.
See also: knee, weak
References in periodicals archive ?
Most pizza aficionados will love the Vegan Notzzarella or the Vegan Notzzarella Uncheddar options, and veggie lovers will go weak in the knees for the Vegan Spinach Chumus or Vegan Veggie Chumus.
I know thousands of females who go weak in the knees just by hearing Eminem's name (Letters, 12/11/00).
If you find yourself getting weak in the knees at the thought of a good pan-fried sausage, take heart.