Fighting definition from http://www.kenrinhacks.com: The act of snapping back to a player model head when recoiling, despite the fact that recoil is relatively random. Also, the act of snapping to player model heads even when not recoiling.
Definition of hacking from http://www.kurosjustownedyourface.com: The act of snapping back to a player model head when recoiling, despite the fact that recoil is relatively random. Also, the act of snapping to player model heads even when not recoiling.