Place the chicken breasts at the base of your slow cooker.
In a separate bowl, thoroughly mix together the honey, yellow mustard, Worcestershire sauce, melted butter, minced garlic, oregano, salt, and pepper. Hold off on adding the heavy cream until the end of the cooking process.
Pour this honey mustard blend over the chicken, ensuring the breasts are well-coated.
Cover the slow cooker and cook on the LOW setting for 6 hours.
Once the time is up, pour in the heavy cream.
Using two forks, shred the chicken directly in the slow cooker. Stir everything together until the cream has fully incorporated into the sauce.
Serve and enjoy your deliciously tender honey mustard chicken!