a part of a device or mechanism that works with a plunging or thrusting movement 柱塞,活塞 ■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
(informal)a person who gambles or spends money recklessly (非正式)滥赌的人,乱花钱的人