Aggro

From EQ2i, the EverQuest II wiki

Aggro

Abbreviation for Agression, also known as Hate. Hate is the method used by the EQ2 monster AI to determine who the monster will try to kill. The monster keeps a table of hate points and attacks players in that order. Damage, Healing, Buffs and Debuffs all increase Hate. Some spells and combat arts have special effects that lower Hate.