| Plunger 1. (n.) One who, or that which, plunges; a diver. 2. (n.) A long solid cylinder, used, instead of a piston or bucket, as a forcer in pumps. 3. (n.) One who bets heavily and recklessly on a race; a reckless speculator. 4. (n.) A boiler in which clay is beaten by a wheel to a creamy consistence. 5. (n.) The firing pin of a breechloader. Thesaurus Entries adventurer, betting ring, bettor, big operator, boneshaker, cardshark, cardsharp, cardsharper, compulsive gambler, crap shooter, deep-sea diver, diver, free diver, frogman, gambler, gamester, gunslinger, hazarder, jumper, lame duck, margin purchaser, operator, parachute jumper, pearl diver, petty gambler, piker, player, punter, scalper, scuba diver, sharp, sharper, sharpie, skin diver, sky diver, smart operator, snorkel diver, speculator, sport, sporting man, sportsman, stag, tinhorn, tipster, tout, venturer, wagerer |