Preheat the oven to 375 degrees F (190 degrees C).
In a medium bowl, mix the mayonnaise, sour cream, Parmesan cheese, Worcestershire sauce, garlic powder, onion powder, and pepper. Stir in the crabmeat.
Spread the mixture into a 9 inch pie plate.
Sprinkle the mozzarella and cheddar cheese over the top.
Bake for 20 minutes, or until the cheese is melted and bubbly.
Serve hot with crackers or chips.
Interesting Facts
Crab dip is a popular appetizer in the United States, especially in the southern states.
This dish can be served cold or hot.
You can also include other ingredients like chopped green onions or diced bell peppers for a more flavorful dip.