Preheat oven to 350 degrees F.
In large mixing bowl, combine cream cheese, sour cream and mayonnaise. Stir to combine and add in ¾ cup cheddar cheese, green onions, parsley and garlic.
Mix together and add Old Bay seasoning, salt, Worcestershire sauce, lemon juice and hot sauce. Stir until well combined.
Gently fold in the lump crab meat until well distributed.
Transfer the mixture to 9-inch pie plate or cast iron skillet. Sprinkle with the remaining ¼ cup cheese.
Bake for 20-25 minutes until cheese is melted and dip is bubbly.
Garnish with additional green onions and parsley (optional).
Serve warm with toasted bread, crackers or tortilla chips.