The lucky invitees weigh themselves before taking their first bite then again after the final bit of stuffing has been downed, and whoever tips the scales with the biggest weight difference at day's end is declared the winner.
We're not sure what you "win" exactly. Pride?
Incognito came into the event with form. The defending champ from 2015 gained nearly seven kilos last year, and initially, that experience was thought to be enough to deter him from going around again in 2016.
"I'm out," Incognito told The Buffalo News. "I gained too much weight last year."
Teammate and fellow weight-gain enthusiast Garrison Sanborn was sceptical about this before the big day arrived though.
"He can't shy away from competition. He says that now, but he'll be in there."
He was right. Incognito came to Wood's place on Thanksgiving, he saw, he ate and he conquered. Again. He packed on more than four kilos this time around.
And his plan? Simple. Eat everything. "You get sick of one thing, move on to the next one," he told The Buffalo News.