Preheat the oven to 350°F. Place the meat in a casserole dish, cover with foil to keep it from drying out, and set in the oven until warmed through, about 35 minutes. In a microwave-safe bowl, microwave the cheese dip until melted.
Empty the tortilla chips onto a large platter, spreading them evenly out to the edges. Layer the warm meat, cheese dip, Bar-B-Q sauce, lettuce, green onions, and tomatoes over the chips. Add enough jalapeño slices to suit your taste, and finish with a light sprinkling of dry rub. Serve immediately and watch them disappear!