Whoopee cushion
（重定向自Whoopie cushion）
A whoopee (or whoopie) cushion, also known as a farting bag, windy blaster, poo-poo cushion, and Razzberry Cushion, is a practical joke device involving flatulence humour, which produces a noise resembling a "raspberry" or human flatulence. It is made from two sheets of rubber that are glued together at the edges. There is a small opening with a flap at one end for air to enter and leave the cushion.