This is a glitch that makes it look like you are wearing Contest Winners Tabard. What is the Contest Winners Tabard, and what does it look like?
This item was given to the Alliance character and the Horde character with the most honor on each server at the end of the Test of Honor Contest. This contest ended on May 24, 2005.
Things you will need to do this buff.
1. WoW's 8th Anniversary Item/Buff
2. A Tabard (I used Reowned Guild Tabard, but it should work on all)
3. Druid/Shaman (I have not tried it with potion of illusions or any ingame item that makes you transform into something else.)
Steps on how to do this:
1. Equip Tabard
2. Put on WoW's 8th Anniversary buff
3. Go into Ghost Form/Cat Form basically any form should work
4. Exit out of the form and it should look like you have the tabard.
Pictures of proof and it working:
http://imgur.com/UVXcZ (These other images are quite big and I don't want to spam your screen with huge ass images)
https://i.imgur.com/gRGEK.jpg
NOTE:That when you get on a flying mount or ground mount the tabard illusion does go away.