2
Any given amount of time (usually an hour or more) where one's goal is to smoke as much marijuana as physically possible.
Dude, my place at eight, we're having a marijuanathon.
Oh man, I'm there. I'll bring Dr. Pepper.
by SweetPeachyKush September 11, 2011
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5
the act of watching a marathon of a tv show whilst under the influence of THC
I just had another marijuanathon of house m.d. It was a great day!
by clintmilitary December 20, 2010
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