knock your socks off
US /nɑk yʊər sɑks ɔf/
UK /nɑk yʊər sɑks ɔf/
1.
to impress or surprise someone greatly
:
•
The band's performance is going to knock your socks off.
•
Wait till you see her new painting; it will really knock your socks off.
to impress or surprise someone greatly