Top Definition
A day at Knox College when all classes are canceled and students get drunk and play in a mud pit. It's a surprise and you don't know until 6 am the day of Flunk Day! There are fryers who wake everyone up with pots and pans. There are also flunk day scares...which are just mean.
Yo man, when's Flunk Day?
by Prairie Fire33 April 21, 2011

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