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1.
Upper BlackRock Spire, a high-level instance (dungeon) in World of Warcraft.
A:Wanna do UBRS?
B:Sure.
by Feranor September 21, 2005
 
2.
Upper blackrock spire, a High level instance (dungeon) in the mmorpg game, World of Warcraft.
Looking for group to UBRS!
by Konrow September 19, 2005
 
3.
ubr
Initials of "You better recognize"
by IHS May 14, 2003