Video game jargon for a something that’s become aggressive towards a target. An enemy whose AI changes to targeting or pursuing you when you are close enough to it is an enemy that has been “aggroed.” An enemy returning to its neutral AI has been “deaggroed.” This can apply to humans as well; a player acting as a decoy in a team-based game can be said to be “drawing aggro.” Manipulating enemy AI or human behavior can be extremely useful.