With a rubber spatula, mash the mayonnaise, sour cream and blue cheese together in a medium bowl.
Stir in the rest of the ingredients.
Cover and refrigerate to blend the flavors, at least 2 hours or up to 2 days.
Transfer to a serving bowl and serve chilled with potato chips, broccoli and cauliflower florets, carrot sticks, celery sticks, cherry tomatoes, cucumber slices and/or zucchini slices.