Pigeon
A pigeon is a player who is seen as a bad player by others. He is a weak player who makes many mistakes and loses money.
The simple explanation
The word is a name for a victim of better players. A pigeon may play a very different strategy or not understand the basics.
A closer look
Pigeons are the same as fish or marks. Good players try to find tables with pigeons. It is not polite to call someone a pigeon to his face. Treat weak players with courtesy to keep them at the table.
A practical example
A new player calls every bet with weak hands. The regulars call him a pigeon.
Full explanation
A pigeon is a player who is seen as a bad player by others. He is a weak player who makes many mistakes and loses money.
A pigeon is a weak player.
He loses money to better players.
It is the same as a fish or mark.
Be polite to keep him at the table.