weak at the knees

weak at the knees

1. Literally, in danger of collapsing because one's knees may buckle, due to faintness brought on by a strong emotion, exhaustion, etc. Hearing the news of my father's sudden death, I went weak at the knees and could barely remain standing.2. By extension, affected by a strong emotional reaction to someone or something. In this usage, the reaction is usually positive and associated with romance. Just thinking about Samantha makes me feel weak at the knees.See also: knee, weak

weak at the knees

overcome by a strong emotion.See also: knee, weak