Laos Flipor
The content of this article is not part of official Warcraft lore, but has nevertheless become part of the World of Warcraft culture or community.
Laos Flipor was a jester in the Court of Lordaeron under King Terenas Menethil II of the kingdom of Stormwind. She had a reputation in the Court, it was said, for bad jokes and poor taste. When orcs invaded Azeroth, and the Second War began, she was fond of telling the following joke:
Orc walks into a bar, leaves his axe at the door.
Barman: Hey! You can't leave that lyin' there!
Orc: That no lion, that's an axe!
Unfortunately, Flipor was later murdered by Arthas Menethil when he murdered his father, apparently because after being corrupted by Frostmourne, he lost his sense of humor.
A Tabard with +10 to all stats named the 
[Tabard of Laos Flipor] can be found in the game, obtained from any guild tabard vendor via the quest "Funny Like a Clown?".
Futher reading
WoW Insider Phat Loot Phriday: Tabard of Laos Flipor