odds-on favorite
The person, car, racehorse most favored to win. (Used almost exclusively in reference to racehorses in the phrase "odds-on favorite.") As usual, Man o' War is the odds-on favorite to win. I'd say no other horse really stands a chance. Who do you think is the odds-on favorite to win the World Cup?
odds-on favorite
the most popular choice of a wager. Fred is the odds-on favorite for president of the board of trustees.