Polyphagia is called pigging out.
The world champ is Takeru, no doubt:
All comers he whomped
In 12 minutes he chomped
53 hot dogs. "Top dog!", we all shout.

Note: "Hotdogs may have been invented in America - but when it comes to eating them, the Japanese are the best on the planet. At the 2004 World Hotdog Eating Championships on July 4th, Takeru Kobayashi pounded 53 hotdogs in just 12 minutes to set a new world record! That's more than one dog every 15 seconds!"

Hotdog Eating Contest World Champion Takeru Kobayashi
http://www.kidzworld.com/site/p1015.htm