In a large bowl mix together cream cheese, mayo and sour cream. Stir in Parmesan cheese, cheddar cheese, lemon juice, hot sauce, salt and pepper until well combined. Fold in crab meat.
8 oz cream cheese, 1/2 cup mayo, 1/2 cup sour cream, 1/2 cup shredded Parmesan cheese, 1 cup shredded cheddar cheese, 1 Tablespoon lemon juice, 1 teaspoon hot sauce, 1/2 teaspoon salt, 1/4 teaspoon black pepper, 1 pound lump crab meat
Pour into a 1 quart baking dish. Sprinkle with remaining Parmesan cheese.