From the phrase knock someone's socks off
sock-knocking (comparative more sock-knocking, superlative most sock-knocking)
- (idiomatic, rare, informal) stunning, amazing, very impressive.
- 2009, Frank Tinsman, Chaos and Rage (page 98)
- Hardware or software, if there was one thing Morton did astoundingly well, it was concocting sock-knocking techno gizmo solutions to the most arcane problems.