Semi-derogatory term used by professional gamblers to describe just another sucker at the casino. While professional gamblers are at a blackjack table counting cards, the "ploppies" are the players at the table who the casino loves because they play the game at an average level (or below) and just don't know any better. Sometimes ploppies can get in the way of the professional players.
advantage player at Three Card Poker table: "if only the damn ploppy at third base would leave, then I could take his seat and have a clear view of the dealer's hole card each hand!"
ploppy at the table: "darn, I didn't think the dealer would have that ace!"
Derived from the well-known aquatic shelf animal, lobster, the plopster has many identical attributes as the lobster like an external skeleton, however the plopster's outer skeleton is completely composed of shit. The plopster like the lobster is eaten in several different cultures, only unlike the lobster which is usually eaten as a main course, the plopster is eaten for dessert.