Jumbo Joker slot has a variety of different bonuses and extra spins. Jumbo Joker is a double 3-reeled slot with 5 paylines featuring traditional slot machine symbols. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. . Show me Bonuses. Jumbo Joker slot has a variety of different bonuses and extra spins. No information is available for this page. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. These awards. These awards. No information is available for this page. These include bright red berries, watermelons, lemons, grapes. A list of the latest no deposit bonus codes updated daily from the popular casinos with regular offers for new and existing casino members. Jumbo Joker is a double 3-reeled slot with 5 paylines featuring traditional slot machine symbols. These include bright red berries, watermelons, lemons, grapes.