I was camping aeonaxx and lost him to some dude but he was nice enough to tell me spawn time etc. He said "Almost shit my pants when npcscanner went off". I thought it didn't work.. He said he has a mouseover. can someone explain said mouseover to me. Noob question maybe but I figured i'd ask here.

It is a macro it does whatever commands @ your mouse over target.. kinda like in pvp how ppl cast spells on people they Aren't targeting.