A whoopee cushion, also known as a farting bag, poo-poo cushion and Razzberry Cushion, is a practical joke device, used in a form of flatulence humour, which produces a noise resembling a "raspberry" or human flatulence.
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George Carlin incorrectly used the phrase bilabial fricative to refer to the sound of blowing a raspberry, which is correctly called a linguolabial trill (except as performed by chimpanzees).
Its most famous occurrence in Italian cinema is in Federico Fellini's I vitelloni (1953), where the idler played by Alberto Sordi jeers at a group of workmen, combining this gesture with a raspberry.
Set in Victorian times, it is a Jack the Ripper parody in which a mysterious figure goes around blowing raspberries at members of the upper classes.