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A Shaytard marathon is the act of watching numerous hours and videos of the famous YouTube star, "ShayCarl" and his family which he refers to as the "Shaytards". He started making video logs every day in the year 2009 and he still continues today with over 2 million subscribers.
"Dude, why are you so tired?"

"I stayed up all night watching a Shaytard marathon."
by paigeywaigey :) November 10, 2013
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