Balloon Belly/Comic Books

Secret Wars 2 had the Beyonder in human form pigging out on a gangster's yacht. He later vaporizes the flab in a second.
The New Universe title DP 7 had a paranormal named Sponge who would absorb all the moisture in the air at a massively accelerated rate, causing her to balloon up in the space of seconds. She could purge the water equally quickly, looking like a punctured water balloon.
Superdickery juxtaposes two Jimmy Olsen covers (here and here) to reference this trope, though strictly speaking the two issues were published over a year apart (July 1959 and December 1960) and are not actually connected.
In "The Day Flash Weighed 1,000 Pounds" (The Flash #115, 1960), the Flash is zapped with a super-fattening ray by the villain of the week (who then, to add insult to injury, gives him amnesia and sells him to a traveling carnival as a sideshow attraction). He's back to normal by the end of the issue, thanks to an implausibly fast (even given that this is the Fastest Man Alive) weight-loss regimen.
- It involves steaming himself in a room used to dehydrate potatoes, for the curious.
Jughead acquires one after his binges in Archie Comics.
In Garfield, the title character devours a lot of food even for him, but [{{[http|//garfield.nfshost.com/1983/08/08/ the shape he gained}} was more flabby than round.
One strip of Calvin and Hobbes had Calvin imagining growing to immense proportions after eating. In reality, he just had a bellyache for eating too fast.
Snoopy ends up like this after eating 23 hot dogs during a baseball game. While playing second base.
Red from "Red And Rover" is known to binge on Halloween candy every few years.
- Plus he tried to break his own watermelon-seed-spitting record.
- And his mom makes great cookies.
In one The Beano strip of The Bash Street Kids, the already balloon-bellied Fatty is forced to play football (soccer), but as his name indicates he is not the fittest of characters. He solves this problem by playing in goal, and eating so much that he is fat enough to fill the entire goal-mouth!
Happens on a few occasions to Nemo and Flip in Little Nemo in Slumberland after they eat something unusual.
In X-Men, Storm first met Gambit while she was temporarily de-aged to about ten or twelve (a bit of amnesia, too). Early on, he took her to eat at (apparently) a friend's home; she was so hungry and the food so good that she stuffed herself, finally sitting back and commenting in a surprised way, "My belly is bigger."
Gold Digger has, amongst its Cute Monster Girls, the Harpy Charlotte, a ditzy woman who is so obsessed with peanuts and pretzels that she goes temporarily insane around them and devours every last one she can find to the point of almost killing herself. This invariably results in a visibly distended stomach, if she can get enough, and once gets her Mistaken for Pregnant after she waddles off of a plane groaning in the after-effects of a bingefest.
Issue 62 of Gen 13 features a very subtle use of this after a main character binges on junk food.