A Trixie bet in football is a type of multiple bet that combines three selections into four separate bets: three doubles and one treble. To get a return, at least two of your selections must be successful. The main advantage of a Trixie is that you don't need all your selections to win to see a return, making it a more forgiving bet than a straight treble. However, it's important to understand how the odds and stakes work to calculate potential winnings.