Place raw* beef in slow cooker and break up with a beef chopper or large spoon. Pour all other ingredients over beef. Stir well to combine. Cover and cook on high, 3-4 hours or low, 6-7 hours.
Scoop out with slotted spoon onto buns. Serve hot and enjoy!
*Using lean ground chuck is crucial in this recipe because your meat will be terribly greasy cooking it this way if you use regular ground beef. However, if all you have is regular ground beef, simply brown it in a skillet ahead of time, add it to the slow cooker with all other ingredients, and cut cooking time in half.