ELI5: Explain Like I'm 5

fixed-odds gambling

Fixed-odds gambling is a type of gambling where you place a bet on something and the amount of money you can win is predetermined. For example, you might bet on a sports game and the amount of money you could win if your team wins is set in advance. Fixed-odds gambling is a bit like a lottery, except you get to pick what you want to bet on, like a football game or a horse race, and the amount you can win is determined ahead of time.