: the one who is certain (to do something) He's a sure bet to receive the award.

Surebet (or Arb) is a situation in sports betting that occur due to inconsistency in the odds of different bookmakers, and leads to a bettor's win regardless of the outcome of a sports match. [!] In this article, the terms "Surebet" mean the same thing as the term "Arbitrage situation". These are equivalent concepts.