Marinade: In a blender, combine the orange juice, onion, garlic, chili powder, cumin, salt, smoked paprika, and one cup of the pineapple chunks (this is where I use up the core to avoid waste). Blend until very smooth.
Slow Cooker: Place the pork chunks in the bottom of a slow cooker and pour all the marinade over top. Stir to coat the pork evenly with the marinade.
Cook: Cook the pork on HIGH for 3-4 hours or LOW for 5-7 hours, checking at the lower end of the time. The pork is done when it is fork tender but not mushy – this will depend on your slow cooker as well as the size and type of pork you use.
Pineapple: Gently shred the pork into bite-sized pieces, then add most of the pineapple to the slow cooker. Cook for 30-45 minutes more to heat the pineapple through.
Broil:(optional) For added texture, spoon some of the meat onto a sheet pan and broil until crispy at the edges right before serving.
Serve over nachos, in tacos, or make burrito bowls with your favorite toppings. Enjoy!