2
1) Encountering something so incredible that it knocks your socks off.

2) Getting physically hit so hard, that your body leaves the ground and your socks behind.
"Hey did you see Merlin the rodeo clown get hit by that bull?"

"Yeah, that was a real sock knocker!"
by yardsale April 30, 2014
Get the mug
Get a Sock Knocker mug for your mate Vivek.