Definition

A bettor who wagers extremely large amounts of money, often enough to single-handedly move lines. Whales can be either sharp or recreational, but what defines them is the sheer size of their bets. In gambling contexts, a whale is akin to a high roller of extraordinary scale.

Formula

Example

If a millionaire casually bets \$500,000 on Canelo, sportsbooks will adjust the odds due to that bet’s liability – this bettor is a **whale**. Even if not especially skilled, a whale’s bet (because of its volume) can cause line shifts to manage the book’s exposure.