Knock your socks off
Meaning
Impress someone greatly.
Usage
Used for remarkable performances or surprises.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Metaphor for being blown away so hard one's socks fall off.
Used widely in 20th-century American advertising and entertainment.