In the bottom of a 5 or 6 quart slow cooker, combine the stock, honey, brown sugar, soy sauce, worcestershire sauce and garlic. Whisk until smooth.
Cut the beef in half lengthwise. Place the two slices side-by-side in the slow cooker, and turn to coat on both sides.
Cook on low for 8 hours.
Remove beef from slow cooker and place in a large bowl. Gently pull apart using two forks, or use an electric hand mixer to do it quickly.
Add back into the cooking liquid, and toss to coat.
