A movie marathon that consists entirely of films containing Michael Cera as the main character. These marathons are to be viewed in chronological order by release date.

-Term coined by a proven Master of the Internet, and therefore not my credit.
Dude 1: Hey bro, you up for (arguably cool activity)?
Dude 2: Nah dude, I'm headed to watch a Cerathon at another bro's house.
Dude 1: That blows (arguably cool activity) out of the water! Can I go too?
Dude 2: Sure!
by Dropkick Johnson January 07, 2011
A movie marathon with all of the movies featuring actor Michael Cera.
We should totally have a Cerathon! I haven't seen Scott Pilgrim vs. the World or Youth in Revolt yet!
by KidBlurr January 07, 2011

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