What does lolumad mean in WoW? World of Warcraft Terms

Anyone who has played World of Warcraft for any length of time has probably heard people shouting “lolumad” at each other. But what does this mean? It is actually a combination of three things as you might notice: lol, u, and mad. Basically it can be translated as “Haha, you’re mad!” It is usually used as a way to annoy someone who is arguing with you.
World of Warcraft has a language all its own