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A smorgasboard of food. A buffet of delicassies. A number of food items served at once to a group of friends. A hectic cook up of massive proportion.
Example 1:
"I could eat the balls off a jockey and chase the horse for seconds! Let's cook up an eatathon!"

Example 2:

Geoff says "hey boys lets get some ladies around tonight for an eatathon"

Big Dog replies "how bout we get your mum around for an eatathon"
by Big_Dog_Breno July 13, 2011
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