Fatsuit

A fatsuit, also known as a fat suit or a fat-suit, is a bodysuit-like undergarment used to thicken the appearance of an actress or actor of light to medium build into an overweight or obese character, in conjunction with prosthetic makeup. Fatsuits worn by characters are either deliberately visible or mainly concealed. Most are intended as unseen body padding beneath a costume (e.g., Rosemary Shanahan in Shallow Hal, and Sherman Klump in The Nutty Professor), others appear as realistic flesh and are viewed directly (e.g., Fat Bastard in Austin Powers, and Les Grossman's hands in Tropic Thunder). A fatsuit is often used to provide comedic effect, as in music videos for "Fat" by "Weird Al" Yankovic, "Marblehead Johnson" by The Bluetones, "Keine Lust" by Rammstein and "Way 2 Sexy" by Drake, and the episode "The Cooper Extraction" of The Big Bang Theory.