1.Hogger is not a joke... Its all real... My guild lost many good men fighting this beast... It... It was awful...
2.Kil'jaeden didn't go back in the portal because of those 25 noobs hitting him, it was because he heard Hogger roar.
3.Illidan is hiding in outland from Hogger.
4.Hogger was the reason Naxxramas moved to Northrend.
Make sure your raid clears the surrounding area before engaging hogger, there is a very fast respawn timer for the adds.
Make sure your raid is fully buffed before even attempting him.
The fight starts when you engage Hogger, he will use http://www.wowhead.com/?spell=6730
on your MT, then switch to the THIRD highest person on threat. Because of this it is helpful to have 3 tanks, so the top 3 threat characters will be a tank.
He will use http://www.wowhead.com/?spell=6016
on his target, it is important that the off tank taunts Hogger off the MT, or else Hogger will hit for huge, unimaginable amounts.
Make sure the tanks are quick with the taunts, a Pierce Armor on the MT followed by a crit from Hogger can be disastrous.
Phase 2 starts when the first gnome mage with pink hair dies from an add, this is UNAVOIDABLE, if ANY gnome mage with pink hair dies ANYWHERE on the server, Hogger will enter Phase 2.
(Hogger can not be killed without entering phase 2, if you get him down to 10% while in Phase 1, he will enrage, stunning everyone in melee range, then use Glaive Throw at everyone who is not stunned, this will wipe the raid.)
If Hogger is not entering Phase 2, then a Gnome mage with pink hair MUST be sacrificed to the nearest Murloc, it is the only way.
In Phase 2, hogger starts making fires which the raid must move out of. This is a new idea that Blizzard gave only to Hogger and is completely original in every aspect of the game.
So, this will be new to people, especially if they have raiding experience.
MOVE OUT OF THE FIRES
Once Hogger gets to 10% he enters....
Hogger will start growing, after 1 minute into phase 3, Hogger will be the size of Gruul, and will start hitting your tanks so hard, there is no way they can survive. At this point, you should use all of your cooldowns, and the tanks will start to die, then the melee dps, then the healers, then the ranged dps.
At this point of the fight, http://www.wowhead.com/?npc=7937
will come out to assist your raid, he will be able to taunt Hogger off your raid, and if you have enough dps alive, you will be able to kill him.
6.Tried to kite him to Org to see if he would fight Saurfang, but the server crashed because of too much awesomness.
7.Once you go Hogger, It's physically impossible to go back.
He's the biggest joke in WoW
I wouldn't call a 40 man raid boss a joke