Creating and promoting strategies for the Warhammer Fantasy or Warhammer 40,000 tabletop miniatures games without actually testing them on the battlefield. Most especially found on message boards.
Internet guy A: The Thousand Sons are unstoppable because they have two wounds.
Internet guy B: What a load of theoryhammer.
Internet guy B: What a load of theoryhammer.
by Sebastian Gorkamorka October 20, 2005
Get the theoryhammermug.