Meaning of PLUNGER in English

PLUNGER

■ noun

1》 a part of a device or mechanism that works with a plunging or thrusting movement.

↘a device consisting of a rubber cup on a long handle, used to clear blocked pipes by means of suction.

2》 informal a person who gambles or spends money recklessly.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.