punter
n. countablen. someone who bets money on things like horse races or sports. In British English, it is also a casual way to talk about a customer in a shop or bar.
n. a person who gambles or places a bet; in British English, a customer or client of a commercial establishment. Often carries a slightly informal or cynical tone depending on the context.
The local punters are placing their bets on the big race.
The pub was packed with punters hoping to see their team win the championship on the big screen.
Market analysts noted that while high-street punters were spending less on luxury goods, the demand for essential services remained remarkably stable throughout the quarter.
From punt + -er.
Common in British and Australian English; less frequent in American English where 'bettor' or 'customer' is preferred.