Gambler
A gambler is a player who wagers money at unfavorable edge odds, which means he is the one at a disadvantage in the long run.
The simple explanation
In a general sense, a gambler takes bets that have a negative expectation. In poker, the word is also used for a loose player who likes big swings.
A closer look
Edge odds describe a player's advantage or disadvantage relative to the other players. A gambler in this sense has a negative edge. A poker player aims to have a positive edge through skill, hand selection and discipline. Bankroll management is the key to surviving the swings.
A practical example
A person who keeps betting heavily at odds that are against him is a gambler in this sense.
Full explanation
A gambler is a player who wagers money at unfavorable edge odds, which means he is the one at a disadvantage in the long run.
A gambler bets at an unfavorable edge.
He has a negative edge.
Poker players aim for a positive edge.
Manage your bankroll.