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Marathon Tuesday is similar to Marathon Monday in that it is an event involving the consumption of massive amounts of booze.

What Marathon Tuesday is not:
-on a Monday
-in Boston
-associated with a contest of athletic ability
Y'all you know what tomorrow is?
Marathon Tuesday!
A wonderful day to ditch all prior commitments and spend 18-24 hours consuming alcoholic beverages until we black out.
by geniusyall May 26, 2011