Combine all ingredients in a large mixing bowl and stir until evenly combined. (You can also stir the mixture actually inside the bowl of your slow cooker, but it would be easier in a large mixing bowl.) Transfer the mixture to the bowl of your slow cooker, that has been misted on the inside beforehand with cooking spray.
Cook on low for 3-4 hours or on high for 2 hours, or until the dip is completely warmed through and the cheese is melted. Give the dip a good stir and season with extra salt and pepper if needed.
Transfer to a serving dish, and serve warm with chips or bread or pita crackers or whatever dippers you’d like.