1 definition by KingRolo

Top Definition
A troll who thinks he's actually good at something he's not, most likely a video game, but can refer to anything.
This guy is horrible with Pikachu, he's such a Mustard Sock.

Good thing this Mustard Sock has no idea how to play LeBlanc, that hero is imba.
by KingRolo November 03, 2010

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