ブーブークッション

noun

whoopee cushion; fart cushion

A novelty cushion that makes a fart-like noise when sat on. The name is onomatopoeic from the sound.

• 友とも達だちの椅い子すにブーブークッションを置おいて、大おお笑わらいした。

  I put a whoopee cushion on my friend's chair and we had a good laugh.