plunger
/ˈplʌndʒə(r)/noun
1
- a part of a device or mechanism that works with a plunging or thrusting movement柱塞, 活塞。
1.1
- a device consisting of a rubber cup on a long handle, used to clear blocked pipes by means of suction（疏通管道用的）手压皮碗泵, 拔子。
2
- informal a person who gambles or spends money recklessly〈非正式〉滥赌的人; 乱花钱的人。