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The act of eating a large bag of food that was not origionally packaged in said bag for consumption.

This usually refers to gorging the entire bag without sense to yourself, or respect for anyone who may be around you.

In short: Disgustingly Obnoxiously gorging a bag of left over food.
oh man Joe just pulled a BaggaBevins with his leftover pizza in the lunchroom I think I'm gonna be sick.
by JoeBob20 December 15, 2010