Knock someone's socks off
/nɒk ˈsʌmwʌnz sɒks ɒf/informalUK · US
What does “Knock someone's socks off” mean?
Knock someone's socks off means to impress or amaze someone
A singer whose voice is far better than you expected might knock your socks off. The phrase conveys a strong reaction, not mild approval.
“This will knock your socks off” can sound like a sales promise. Use it when the enthusiasm feels earned.
When do people say it?
Use it for something surprisingly impressive, such as a performance, a meal or a view. It often appears in enthusiastic recommendations.
“The young singer’s final song knocked our socks off.”
Is it formal or informal?
Register: informal. It is most at home in everyday conversation rather than formal writing. Most common in UK and US.
Where does it come from?
The image exaggerates the force of a surprise until it seems strong enough to remove your socks.
Origin confidence: Disputed; treat with caution
How do you say “Knock someone's socks off” in other languages?
Related idioms
- Blow someone's mind, to amaze or impress someone very strongly
Last updated 2026-10-01