Brown the ground beef in a skillet over medium heat. Add the taco seasoning and cook until the meat is fully seasoned and no longer pink. Remove from heat.
While the beef cooks, mix the sour cream, lime juice, and cilantro in a small bowl to make the lime crema. Set aside.
Warm the flour tortillas briefly in the microwave or oven so they are pliable. Press each tortilla into a small bowl or ramekin to form a cup shape, then fill with a layer of chopped romaine lettuce.
Spoon the cooked taco meat evenly into each tortilla cup over the lettuce. Top with cherry tomatoes, black olives, and shredded cheddar cheese.
Drizzle the lime crema over each cup. Insert three tortilla chips upright into the salad of each cup to create the graveyard effect.