It refers to an enclave of your roommate's family showing up unexpected and taking over the house. It's not just their mother and/or father, but their aunts, uncles, and grandparents.
We were playing Halo 3, drunk as shit, and all of a sudden the Mazynauts were making burritos and moving shit around. At least the Grandma pounded a shot with us.
by DudeGaGa January 30, 2009
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