. These awards. Jumbo Joker is a double 3-reeled slot with 5 paylines featuring traditional slot machine symbols. Jumbo Joker slot has a variety of different bonuses and extra spins. These include bright red berries, watermelons, lemons, grapes. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. No information is available for this page. Show me Bonuses. For instance, the gambler that sees 3 Jokers on the field gets Mystery Prizes. These awards. These include bright red berries, watermelons, lemons, grapes. Jumbo Joker slot has a variety of different bonuses and extra spins. No information is available for this page. 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.