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