
In the bowl of your slow cooker combine prepped chuck roast, onions, garlic, green chilies, chipotles, ground cumin, oregano, salt, and pepper.
In a small bowl whisk together beef broth, vinegar, and lime juice; pour broth mixture over ingredients in slow cooker.
Add bay leaves.
Cover and cook on LOW for 6 to 8 hours, or on HIGH for 3 to 4 hours. Cooked beef should be tender and should fall apart easily when shredded with a fork.
Remove beef from slow cooker and transfer to a cutting board.
Using two forks, or shredder claws, shred the beef into bite size pieces.
Transfer shredded beef back into the slow cooker; stir everything together until completely incorporated.
Garnish with cilantro or parsley and serve.