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When one member of a Lan Party runs unnecessary webpages and or videos (usually in the Highest resolution possible) that they use so much bandwidth that other Lan party members start to lag
Dude 1: "come see this ultra high def video of this cute lolcat!"

Dude 2: "Lan foul! That video is making me lag so bad."
by DrKnightHawk April 09, 2011
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