Top Definition
When someone on your Facebook Tags an incredibly large amount of your photos, in some cases a whole album, causing the persons facebook to be filled with notifications.
Alex: Hey Caleb, the party photos are so rad!

Caleb: Yeah they're kinda cool but some chicks attempting a Photagathon, seriously I have like 70 notifications!
by A to the J is rad January 02, 2010
5 Words related to Photagathon

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