A Parlay Boost token is a token that gives BetMGM users a juiced-up version of an odds boost, which increases the potential payout. Some Parlay Boosts are sport- and event-specific while others are eligible for all sports and events on the online sportsbook. To use a Parlay Boost token, simply add the desired bets to the betslip, click “Apply Reward,” choose the Parlay Boost token, and click “Place Bet.”