In a liquid measuring cup or bowl, combine the mayonnaise, garlic, lemon juice, Dijon, and Worcestershire sauce, and salt. Stir to combine.
Stir in the Parmesan, followed by the water. Season generously with black pepper, to taste. I usually think the dressing tastes just right, but if you’d prefer a more bold dressing, add another ¼ teaspoon Worcestershire sauce, or for more zippy dressing, add up to 1 teaspoon additional lemon juice. Serve as desired.