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1.
n: aggro
v: aggroed

Short for aggrovated, aggrovation, whatever you think it stands for.

Attacking of a non-player character. Aggro is that NPC that you attacked and it will start attacking you.

Generally used in MMO's like EverQuest 2 and WarCraft, to name the most common ones.
Goddamn, I aggroed another mob with my AOE.
by excitation August 26, 2006