what does ' dragging your knuckles' mean?

In a post on the Netherlands-thread someone said "i'll go drag my knuckles elsewhere". I've never heard this expression before, and can't find what it means by Googling either. Can anyone enlighten me?
Thanks!

What was the context?

I think of "dragging knuckles" as a reference to Neanderthal-like behavior; that is, the behavior of a form of human who doesn't walk erect.

Knuckle dragger definitions from Urban Dictionary - not something you typically want to be called.

Unless you're a snowboarder, of course. People might call you a knuckle dragger if you've just done something really dank.

This was the context , see the last reply by the OP. I think I understand what he meant now, by the link provided above.
Thanx!