放屁坐墊 [－－－垫]

Jyutping fong3 pei3 zo6 zin3
Pinyin fàng pì zuò diàn

Definitions (Wiktionary)
  1. noun
    whoopee cushion
    (syn.) 放屁垫, 放屁墊

放屁坐墊 [－－－垫]

Jyutping fong3 pei3 zo6 zin3
Pinyin fàng4pi zuò4dian

Definitions (CC-CANTO)
  1. a whoopee cushion [written and colloquial]