1Place onions in the bottom of a slow cooker. Cut the pork into quarters and season with the cumin. Place the seasoned pork on top of the onions in the slow cooker.
2Pour the beer and diced tomatoes over the pork. Add the cilantro, chipotle peppers and jalapenos to the slow cooker as well. Mix well. Season with salt and pepper to your own preference.
3Cook pork and other ingredients in slow cooker on high for 4 hours or on low for 7-8 hours (preferably on low). When done, shred the pork with two forks and serve in tortillas with toppings. Enjoy a Blue Moon with it as well!