Slice two onions. Salt and pepper Boston butt, top with sliced onion. Push six cloves into top of butt. Pour 1/2 cup of water into crockpot with your meat. Cook for about 8 hours on low or until pork is tender and falling apart. I usually put mine on at night and cook until morning. Take out of pot. Pull pork apart removing all fat; clean pot of all juices. Put pork back into pot. Pour BBQ sauce over pot and stir. I sometimes add 1/2 cup of the juice I cooked the pork in. NOTE: You can cook on high for four hours if you don't have much time.