n. Smoking an obscene amount of marijuana.
"Hey, are you going to Greg's house to smoke this thursday?" "Yeah, it's going to be a total marijuanathon!!!"
by Smokey McGee October 03, 2005
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
the act of smoking weed all day erry day
girl: hey babe you wanna come over tonight
guy: sorry babe im havin a marijuanathon with the guys
by Hellmutt Ardigan-Fitzbaddley June 30, 2014
an all day all night marijuana smoking marathon
We drank on Saturday night, Sunday was just a marijuanathon.
by thatonegirl8752 July 09, 2011
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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