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One who has extreme godlike qualities. It is often considered the most awesome and rare thing in existence. It is closely realted to a beastiemonk but is on a much higher level, completely better. MassiveBallsacks are spotted very rarely and only cone out at night.
Fag: Either that guy was modding or he was a beastiemonk.

Smart Guy: Nah, he didn't suck, he was more like a MassiveBallsack.
by Jimmy O PapalaoQuasneac April 05, 2009
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