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!
knock someone's socks off
and knock the socks off (of) someoneSl. 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.
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.
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.
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! knock (someone's) socks off
Slang To overwhelm or amaze.