A plunger is a device for clearing waste pipes. It consists of a rubber cup on the end of a stick which you press down several times over the end of the pipe
One who plunges, or spends money recklessly in bets, etc The Marquis of Hastings was the first person so called by the turf One night he played three games of draughts for 5,000 in an hour and a half He paid both debts at once before he left the room
a sliding reciprocating piece driven by or against fluid pressure1 especially a long valveless piston used as a forcer in a force pump, as a ram in a hydraulic press
{i} 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)