aggro

1. (chiefly UK, Australia) Aggressive behaviour; loud, intimidating behaviour that convincingly threatens violence without necessarily actually becoming violent.Examples: "Move along, lads; we don't want any aggro."; "That is the case because, according to Marsh, soccer hooliganism is one of Britain's principal forms of aggro. If it is true that there is an absence of aggro traditions in the USA — and there is a wealth of evidence which suggests that Marsh is wrong on this score — then it is reasoble to deduce from Marsh′s arguments that it is unlikely that phenomena such as soccer hooliganism could or ever will develop there."; "‘We ain′t got a name yet. We′re into aggro.’ ‘Aggro?’ ‘Yeah, you know, aggression, aggravation. Aggro’."AustraliaUKslanguncountable

2. (gaming) A measure of how belligerent a player is – a high value may inspire either avoidance or preemptive hostile action from enemies.Examples: "To reduce one player's aggro level, the other must build up his own."; "What isn't so gimmicky is the Aggro System, where you draw fire onto yourself by acting aggressive, while your partner sneaks off blindsiding distracted enemies. Aggro depends on how big your current weapon is and how often you act aggressive."; "We asked for an ability to trasnfer^([sic]) our aggro to another player—were told that could cause some abuse."slanguncountable

3. (gaming) Hostile attention from an enemy that should target players with better defenses.Examples: "You just pulled aggro off the tank and wiped the raid."slanguncountable