A healthy scratch in the NFL refers to a player who is physically healthy but is not active in the game for strategic reasons. It means that the coach has decided not to use the player, and they are not selected to be in the starting team or on the bench. The term is not an official one with rules, and the team can choose to make a player inactive at their discretion. A healthy scratch can be a player who is fighting and gaining control on the field, and if they are flagged for a physical altercation, the team may choose to make them inactive.