knock socks off
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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 the socks off (someone or something)
1. To thoroughly impress, overwhelm, or excite someone. The show of support from everyone just knocked the socks off me. Apparently that movie really knocked the socks off Tim—he's been raving about it since he came home.
2. To completely outclass, outdo, or outperform someone or something; to soundly defeat or best someone or something. Wow, this coffee knocks the socks off the stuff we get back home. Catherine knocked the socks off the other kids in the spelling bee.
knock someone's socks offand 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.
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 offSlang
To overwhelm or amaze.