Combine butter and all parsley, shallots, garlic, lemon, Worcestershire sauce, salt, pepper and macadamia nuts. Mix very well and roll into cylinder with waxed paper. Place in refrigerator for about 2 hours. When ready cut into circles. Cut lobster, lengthwise, into 2 pieces and place on the grill. Grill for about 5 to 6 minutes and when done place the macadamia nut butter circles on top of lobster meat and let it melt on the grill. Serve immediately.