Place the 2 (14 ounce packages) lit'l smokies sausages into the crock of a slow cooker.
In a medium bowl, combine 1 cup ketchup, 1/4 cup hot honey, 1/4 cup Worcestershire sauce, 2 tablespoons minced garlic, 2 teaspoons hickory liquid smoke, 1 teaspoon salt, 2 teaspoons black pepper, and 1/2 teaspoon ground mustard. Stir until the mixture is smooth and well combined.
Pour the sauce over the sausages in the slow cooker. Stir to ensure the sausages are evenly coated.
Cover the slow cooker with the lid and set it to low. Cook for 4 to 6 hours, stirring occasionally, until the sauce is bubbly and thickened and the sausages are heated through.
Serve warm, directly from the slow cooker or transfer to a serving dish.