plunger

(plunjər)

noun

  1. a person who plunges, or dives
  2. a large, rubber suction cup with a long handle, used to free clogged drains
  3. any cylindrical device that operates with a plunging motion, as a piston
  4. Informal a person who acts hastily or recklessly; esp., a rash gambler or speculator

See plunger in American Heritage Dictionary 4

noun
  1. One who plunges or dives.
  2. A device consisting of a rubber suction cup attached to the end of a stick, used to unclog drains and pipes. Also called plumber's helper.
  3. A machine part, such as a piston, that operates with a thrusting or plunging movement.

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