Remove Pork Shoulder (8 pound) from packaging and pat dry with paper towel to remove moisture.
Apply Yellow Mustard (2 ounce) to the outside of Boston Butt and coat all sides with Barbecue Rub (4 ounce).
Prepare Drum smoker or other bbq grill for indirect smoking at 275 degrees F (140 degrees C).
Place 1 chunk of Hickory wood, 1 chunk of Cherry wood, and 2 Sweet Onion (1/2) quarters directly on coals.
Center Boston Butt on cooking rack and smoke for 3 hours or until desired color is reached. Combine Red Wine Vinegar (8 fluid ounce) and Water (8 fluid ounce) in a spray bottle and spritz butt every hour during smoking process.
Wrap Boston Butt in 2-3 layers of aluminum foil. Apply a light coat of rub and baste before closing foil.
Continue to cook Boston Butt until internal temperature of 198 degrees F (92 degrees C) is reached.
Make Apricot BBQ Glaze: Combine Killer Hogs BBQ Rub (12 ounce), Apricot Preserves (4 ounce), Honey (4 ounce), Apple Cider Vinegar (4 fluid ounce) in a small sauce pot over medium heat until mixtures smooths about 5-10 minutes.
Unwrap Boston Butt and transfer to wire rack. Glaze outside of butt with Apricot BBQ Glaze and return to smoker for 15 minutes.
Rest Boston Butt for 20 minutes before pulling.
Use hands and shred Boston Butt into bite size strands, remove any fat, and serve immediately or store in zip lock bag for 3-4 days in the refrigerator. Enjoy!