knock (one's) socks off

knock (one's) socks off

To thoroughly impress, overwhelm, or excite one. The show of support from everyone just knocked my socks off. That movie really knocked my socks off—I didn't expect it to be so good!
See also: knock, off, sock
Farlex Dictionary of Idioms.

knock someone's socks off

 and knock the socks off (of) someone
Sl. to surprise someone thoroughly. (Fixed order. Of is usually retained before pronouns.) The exciting news just knocked my socks off! The news knocked the socks off of everyone in the office.
See also: knock, off, sock
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

knock someone's socks off

If something or someone knocks your socks off, you are extremely impressed by them. This movie will not knock your socks off, but it will not disappoint. The area has scenery that will knock your socks off.
See also: knock, off, sock
Collins COBUILD Idioms Dictionary, 3rd ed.

knock (or blow) someone's socks off

amaze or impress someone. informal
1991 Barbara Anderson Girls High Years ago she saw a Hockney…the few lines which sketched the owlish face knocked her socks off.
1996 Premiere Ray Liotta strikes perfect notes as Hill while Joe Pesci blows your socks off as sociopathic side-kick Tommy.
See also: knock, off, sock
Farlex Partner Idioms Dictionary

blow/knock somebody’s ˈsocks off

(informal) surprise or impress somebody very much: With that dress and your new haircut you’ll knock their socks off!
See also: blow, knock, off, sock
Farlex Partner Idioms Dictionary

knock (someone's) socks off

Slang
To overwhelm or amaze.
See also: knock, off, sock
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • knock socks off
  • knock someone's socks off
  • knock (one) off (one's) feet
  • knock off work
  • put the boot to (one)
  • knock back a drink
  • be thrown off balance
  • knock (one) for six
  • knock seven bells out of (one)
  • in spite of (oneself)