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1.
Sock gnomes are mythical creatures that pilfer socks. The loss of which only becomes aparent at the exact instant that one really really needs to find them. Sock gnomes are related to the underpants gnomes. The archenemy of the sock gnomes is the sock goblins
Ahhh damnit! I can find any matching pairs of socks... the bloody sock gnomes have been at it again
by Grant McDonald February 02, 2004
 
2.
The tiny little beings that steal the other sock from the dryer. They prefer left socks, but right will do.
"Where did my sock go?"
"The sock gnomes took it."
by Helen and Elizabeth March 05, 2008