also: すっぽん
noun
plunger (for unblocking sinks, toilets, etc.)
A rubber suction cup on a handle, used to clear clogs. The word is onomatopoeic, mimicking the sound of suction.
See also: ラバーカップ
トイレが詰まったので、シュッポンで直した。
The toilet was clogged, so I fixed it with a plunger.