In a large mixing bowl, combine the drained corn, black beans, mayonnaise, softened cream cheese, cheddar, mozzarella, and parmesan cheese. Add the diced jalapeños, crumbled bacon, red onion, salt, and pepper. Stir until everything is nicely incorporated.

Transfer the combined dip to a serving dish and top with freshly chopped green onions.

Serve with tortilla chips or crackers, inviting your guests to dig in.