London Ninja

Word: Punter
Definition:
In British English, a customer of a business, the usage being primarily found in London and Essex.
In both British and Australian English, a gambler, particularly an amateur betting on horse racing.
Not, I repeat, Not the guy who kicks the football when it’s fourth down.
Usage: The area around the pub gets quite busy after all of the punters get out.
Usage #2: Those bloody punters are betting on the wrong horse.

To be perfectly honest, I’ve seen and heard this term used a few times and am still not comfortable using it in public in fear of having sausage and mash thrown at me. Cheers.