Body Inflation, also called Body Expansion, is a fan art genre showing characters whose bodies swell up like balloons, usually focused on the belly, breasts, or buttocks1. When the whole body puffs up in the Violet Beauregarde style from Willy Wonka, fans call the variant 'blueberry inflation'6.

Artists post still drawings, morph sequences, comics, and short animations across deviantART, FurAffinity, Tumblr, and 4chan's /d/ board, with deviantART alone hosting over 100,000 tagged inflation works and 122,000 for expansion3. Dedicated Reddit spaces including r/bodyinflation and r/BreastExpansion host discussion of new pieces12.

Artists typically pick a character, choose a body part to inflate (belly, breast, buttocks, or full body), and post the result as a single morph, sequence, or short animation. Common conventions include a visible cause such as gum, gas, water, or a curse, plus a facial expression somewhere between panic and pleasure. Finished pieces usually go up on deviantART galleries, FurAffinity accounts, or the sorted-by-body-part subreddits12.