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Past the point of insanity, past the point of rationality. Incorperates both the meanings batshit and loco but on a much higher scale. Just losing it, the day before or maybe the day you are commited permenantly to a mental asylum.
Jim: Yo dude, whats up?

John: Not much, dave's nailing hamsters to the wall in the kitchen

Jim: WTF?!? what for?

John: His girlfriend left him for his brother, He's gone completely fucking batshit loco
by Yanosh February 18, 2006
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