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whoopee cushion

or whoopie cushion

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noun
  1. a type of cushion or pillow used as a practical joke that, when sat upon, produces a loud noise resembling flatulence.

Origin of whoopee cushion

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for whoopee cushion

whoopee cushion

noun
  1. a joke cushion that emits a sound like the breaking of wind when someone sits on it
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012