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1.
Small pieces of lint that appear on your feet after removing your socks.
Hey, sucka... you should really wash your feet before putting on your flip-flops. Them sock fossils make you look like you have hobbit feet.
by Ape Creature June 16, 2011
 
2.
The lint that is left between your toes after you take your socks off.
I found a bunch of sock fossils between my toes.
by pseudofakename September 11, 2011