Meaning of PLUNGER in English

PLUNGER

n. piston, cylindrical part that operates with a plunging motion (Mechanics); plumber's tool consisting of a rubber suction cup attached to a pole; one who jumps or dives into water; reckless gambler, bettor (Slang)

Explanatory English dictionary bed edition.      Толковый словарь английского языка Редакция bed.