weak at the knees
If you go weak at the knees, you lose your strength and feel you are going to fall over, usually because of seeing or talking about either someone you are very attracted to or because of something unpleasant or frightening:
The thought of kissing him made me go weak at the knees.
Thesaurus: synonyms and related words
Weakness and vulnerability
- Achilles heel
- at a low ebb idiom
- be (only) flesh and blood idiom
- be sb's poodle idiom
- chink in sb's armour idiom
- ebb
- faint
- impotent
- indefensible
- lax
- limp
- malleable
- susceptibility
- susceptible
- toothless
- totter
- underbelly
- unprotected
- unsteady
- wraith
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