Top Definition
When a person or persons eats a severely large amount of McDonalds at one time, or in the same sitting. Usually consumed by severely obese persons, or persons under the influence of drugs or alcohol
did you hear Evan had his monthly McDonaldsgasm yesterday? He had 4 cheeseburgers, a 10 piece McNugget meal with large fries and root beer, 2 apple pies, and a Big Mac
by IScopedJFK February 01, 2010

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