In a slow cooker, combine the shredded chicken, cream cheese, buffalo wing sauce, and ranch dressing.
Cover and cook on low for about 1.5–2 hours, stirring occasionally, until hot and bubbly.
Stir in the shredded cheddar cheese, cover again, and cook for another 10–15 minutes until melted.
Give it one last stir and serve warm with chips, celery, or just a spoon (hey, we don’t judge).