Weak in the knees

Definition & Meaning of "weak in the knees"

weak in the knees

feeling strong emotions, like fear or anxiety, in a way that makes it difficult for one to stand

What is the origin of the idiom "weak in the knees" and when to use it?

The exact origin of the idiom "weak in the knees" is unclear, as it has been in use for a considerable period of time. However, it is thought to stem from the physical sensation that some people experience when they are overcome with strong emotions or excitement. It is commonly employed when someone experiences a strong, overwhelming, or captivating reaction to a person, event, or situation.