A gambler can mean many things: 1. It can mean anyone who wagers money. 2. It can be synonymous with a maniac. Often, people who enjoy drawing, even with bad odds are called gamblers. These types of gamblers are considered fish. 3. It can mean a professional, solid poker player. According to Doyle Brunson, a gambler is the nickname of the highest breed of poker player. They can win significant amounts of money at high stakes games.