A Big Payoff Bet is a type of wager in which the bettor must correctly predict the outcome of three separate races. The most common type of Big Payoff Bet is the Trifecta, which requires the bettor to accurately predict the first, second, and third place finishers in a race in the correct order. This type of bet can be quite lucrative if the bettor is successful, but it is also very difficult to win.