Balloon Belly/Literature

• In Lois McMaster Bujold's Mirror Dance, Miles Vorkosigan's clone brother Mark binges on combat rations for two weeks, bringing his weight up too in a half-conscious effort to separate himself from his progenitor. Which looked alarming enough given they both are under five feet tall. And then It Got Worse.
• Children classic Winnie the Pooh does this. Pooh eats so much he gets stuck in Rabbit's burrow.
• In Antoine de Saint-Exupéry's The Little Prince (and its movie version) the aviator draws a boa constrictor with an elephant inside. Since the back of the snake is the one he draws as distended, it gets mistaken for the drawing of a hat the first time he shows it to other people.
• Noncomedic example: According to the Zombie Survival Guide, since zombies don't digest human flesh, they can end up with distended stomachs fairly quickly.
• In the Discworld novel Unseen Academicals, Mr. Nutt comes Back from the Dead, feeling hungry, and eats nine pies. (That's as many as three threes! And That's Terrible!) He's a pretty small chap, and, anyway, nine pies, and as such, is described as looking like a snake that swallowed a goat.
• If I eat one more piece of pie, I'll die! If I can't have one more piece of pie, I'll die! So since it's all decided I must die, I might as well have one more piece of pie. MMMM--OOOOH--MY! Chomp--Gulp--'Bye.
• Frequently happens in a realistic manner to characters in Jacqueline Wilson books. Probably most notably in 'Girls Under Pressure' in which the protagonist dabbles with bulimia.
• In The Dresden Files, Harry pays his "spies" (fairies) in pizza. After they've violently consumed the pizza, they look like this for a few minutes, but they return to their normal shape in a few minutes.