Aggro may refer to any of the following:
1. Aggro or add is an online gaming term used when one or more aggressive creatures have targeted a player in the group. Aggro helps group members know which player is being targetted and needs assistance or to be healed.
2. Aggro can also describe real-life aggro. For example, a player might say "parent aggro" or "gf aggro" as a way of letting others know that they need to log off or walk away because a parent or girlfriend is giving them grief.