A day where people drink alcoholic beverages, sunrise of Monday morning, until sunrise of Tuesday morning.
by Shippensburg University March 5, 2014
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A tall, lanky, rather dark Black person (hence the term, Monday) who partakes in a 26.2 mile long running competition. They are typically, but not always, imported from Ethiopia and Kenya.
White Guy 1: "Hey, Murphy, who's that Black guy? Is he on the Celtics?"
White Guy 2: "Nah McDonough, today's the Boston Marathon; it's one of those Marathon Mondays."
by Carl Crawford April 15, 2013
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the greatest holiday, and another reason why Boston is the best city to go to school in
Dude, Jimmy got so fucked up Marathon Monday. I love Boston!
by mcalceet April 17, 2007
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Marathon Monday is often considered, among Bostonians, as the greatest day of each year. Falling on the third Monday of April, the marathon provides a race as a backdrop to the biggest day of drinking and legalized hookie-playing found anywhere in the country.

Over at BC the day takes on even more epic proportions, where all classes are cancelled as the race runs right past campus making it impossible for teachers and commuter students to get there. It's basically just a huge excuse to get wasted…really wasted…like blackout by 11:00 AM wasted. The stringent community and campus official restrictions on drinking are relaxed for the day and an anything goes mentality pervades. In short it’s a total shit show and every college student’s dream.
11:21 AM on Marathon Monday: the winner of the race crosses the finish line and everyone in Boston is already too drunk to notice
by eagles617 April 21, 2009
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The third Monday in April where college students in Massachusetts get the day off due to the Boston Marathon and spend the entire day drinking (often in public).
"What's Marathon Monday?"
"It's the day we all get drunk and run a marathon."
"Let's skip the marathon part and call it a holiday!"
by Smantz0r April 14, 2009
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