You will only understand it if you have played that game.
Dota video : This is a commentary clip from the Blueserver DotA League, which was posted on the old Blueserver forums.
This is for those who have played WoW and raided before.
*WARNING : LOTS OF SWEARING*
If you do not know what is Onyxia or DKP, read this first. It sort of the "Illidan of Level 60" (Back before WoW:TBC), and the "Whelp groups" are the trash mobs that come when you are engaging the boss.
DKP is a point system for raiding. You gain DKP by participating in raids and you use the points to bid for the loot/item you want. So, if you don't have enough DKP, you won't get any loot.
The Followup to OnyxiaWipe
It seems that it is a top guild, that's why that guy is so demanding.
