Brewfest Ram

Source
During the first Brewfest in 2007, an "Honorary Brewer" Hand Stamp could be purchased at the Brewfest Grounds from Belbi Quikswitch in Dun Morogh or Blix Fixwidget in Durotar for.

The hand stamp started a quest which allowed players to purchase a Brewfest Ram or Swift Brewfest Ram from their respective Brewfest Grounds' Ram Racing Apprentice, namely Pol Amberstill and Driz Tumblequick, at the cost of for the normal mount and  for the epic.

Only the epic version is now available, as a drop from Coren Direbrew's Keg-Shaped Treasure Chest in Blackrock Depths.

Mount Journal
Brewers retired this mount from active advertising service after complaints that the beasts were "too temperamental" to control in major cities.